Bài tập trắc nghiệm chương nguyên tử

CHNG NGUYấN T Cõu hi trc nghim 60 cõu Cõu 1: Electron c phỏt minh nm 1897 bi nh bỏc hc ngi Anh (J.J Thomson) T c phỏt hin n nay, electron ó úng vai trũ ln nhiu lnh vc ca cuc sng nh: nng lng, truyn thụng v thụng tin Trong cỏc cõu sau õy, cõu no sai? A electron l ht mang in tớch õm B electron cú lng l 9,1.10-28 gam C electron ch thoỏt nguyờn t nhng iu kin c bit D electron cú lng ỏng k so vi lng nguyờn t Cõu 2: Nguyờn t luụn trung ho in nờn A tng s ht electron luụn bng tng s ht proton B tng s ht ntron luụn bng tng s ht electron C tng s ht ntron luụn bng tng s ht proton C tng s ht ntron v proton luụn bng tng s ht electron Cõu 3: Trong nguyờn t ht mang in l A ch cú ht proton B ch cú ht electron C Ht ntron v electron D ht electron v proton Cõu 4: Trong ht nhõn nguyờn t(tr H), cỏc ht cu to nờn ht nhõn gm: A ntron B electron C proton, ntron v electron D pronton v ntron Cõu 5: ng kớnh ca nguyờn t cú c khong bao nhiờu? A 10-6 m B 10-8 m Cõu 6: Khi lng ca nguyờn t vo c: A 10-6 kg B 10-10 kg C 10-10 m D 10-20 m C 10-20 kg D 10-26 kg Cõu 7: Nguyờn t c cu to t nhng ht c bn no A ntron B electron C proton, ntron v electron D pronton v ntron Cõu 8: Nuyờn t cú ng kớnh ln gp 10000 ln ng kớnh ht nhõn Nu ta phúng i ht nhõn lờn thnh mt qu búng cú ng kớnh cm thỡ ng kớnh nguyờn t s l A 200 m B 600 m C 1200 m D 300 m Cõu 9: Kớ hiu nguyờn t ZA X cho bit nhng iu gỡ v nguyờn t X? A Nguyờn t trung bỡnh ca nguyờn t B S hiu nguyờn t C S ca nguyờn t D S hiu nguyờn t v s Cõu 10: in tớch ht nhõn nguyờn t Z l: A s electron ca nguyờn t B s electron lp ngoi cựng ca nguyờn t C s proton ht nhõn D s ntron ht nhõn Cõu 11: Chn cõu ỳng núi v 24 12 Mg cỏc cõu sau? A Cú 12 electron B Cú 24 electron C Cú 24 notron D Cú 24 proton Cõu 12 Nguyờn t 27 13 Al cú s l: A 13 B 27 Cõu 13 Nguyờn t 39 19 C 14 D 26 C 21 D.20 K cú s notron l: A 19 B 39 Cõu 14 Trong cỏc nguyờn t sau, nguyờn t no cha ớt notron nht? A 235 92 U B 238 92 U C 239 93 Np D 239 94 Pu Cõu 15 Nguyờn t M cú cỏc ng v sau.ng v no phự hp vi t l s proton/s notron=13/15? A 55 26 M B 56 26 M C 57 26 M 58 D 26 M Cõu 16: nh ngha no sau õy v nguyờn t húa hc l ỳng? Nguyờn t húa hc l hp cỏc nguyờn t: A Cú cựng in tớch ht nhõn B Cú cựng nguyờn t C Cú cựng s D Cú cựng s ntron ht nhõn Cõu 17: Trong cỏc phỏt biu sau õy phỏt biu no ỳng? A ng v l nhng nguyờn t cú cựng s ht notron B ng v l cỏc nguyờn t cú cựng s proton nhng khỏc v s notron C ng v l nhng nguyờn t ca cựng mt nguyờn t cú cựng s proton nhng khỏc v s notron ú s khỏc Cõu 18: V nguyờn t gm cỏc electron chuyn ng nh th no xung quanh ht nhõn? A Chuyn ng rt nhanh khụng theo nhng qu o xỏc nh B Chuyn ng rt nhanh theo nhng qu o xỏc nh C Chuyn ng rt chm v khụng theo nhng qu o xỏc nh D Chuyn ng rt khụng nhanh v khụng theo nhng qu o xỏc nh Cõu 19 Cỏc electron trờn cựng mt phõn lp cú mc nng lng nh th no? A Bng B Khụng bng C Gn bng D KX Cõu 20 Cỏc electron trờn cựng mt lp cú mc nng lng nh th no? A Bng B Khụng bng C Gn bng D KX Cõu 21: Phõn lp no sau õy bỏn bóo hũa? A 4s2 B 4p6 C 4d5 D 4f4 C D C M D.L Cõu 22: Lp M cú bao nhiờu phõn lp? A B Cõu 23: Lp electron no cú s electron ti a l 18 ? A K B N Cõu 24: Lp electron liờn kt vi ht nhõn nguyờn t chc ch nht l: A Lp cựng B Lp ngoi cựng C Lp gia D Khụng xỏc nh Cõu 25: S electron ti a lp th n l: A n B n2 C 2n2 D 2n Cõu 26: Trong cỏc phõn lp sau, kớ hiu no sai? A 2s B 3d C 4d D 3f Cõu 27: Nguyờn t ca mt nguyờn t cú bn lp electron K, L, M, N.Trong ú lp electron no sau õy cú mc nng lng cao nht? A K B L C M D N Cõu 28: S electron ti a trờn cỏc phõn lp s,p,d,f ln lt l A 2,4,6,10 B 2,6,10,14 C 14,10,6,2 Cõu 29: Cu hỡnh no sau õy l ca nguyờn t 39 19 D 2,10,6,14 K? A 1s22s22p63s23p6 B 1s22s22p63s23p64s1 C 1s22s22p63s23p63s1 D 1s22s22p63s23p63d1 Cõu 30: trng thỏi c bn cu hỡnh electron no ỳng cho nguyờn t cú Z=16? A 1s22s22p63s23p1 C 1s22s22p63s23p6 B 1s22s22p63s23p3 D 1s22s22p63s23p4 Cõu 31: Cho bit st cú s hiu nguyờn t l 26 Cu hỡnh electron ca Fe l: A 1s22s22p63s23p64s2 B 1s22s22p63s23p63d6 4s2 C 1s22s22p63s23p63d5 D 1s22s22p63s23p63d4 Cõu 32: Cu trỳc electron no sau õy l ca kim loi Cu A 1s22s22p63s23p63d94s1 B 1s22s22p63s23p63d10 C 1s22s22p63s23p63d9 D 1s22s22p63s23p63d104s1 Cõu 33 : Ca cú cu hỡnh electron l: A 1s22s22p63s23p64s2 B 1s22s22p63s23p63d104s1 C 1s22s22p63s23p64s1 D 1s22s22p63s23p63d8 Cõu 34: Photpho cú Z=15 tng s electron ca lp ngoi cựng l: A B C.5 D Cõu 35: Chn cu hỡnh electrron ca nguyờn t kim loi s cỏc cu hỡnh electron ca nguyờn t sau: A 1s22s22p63s23p1 B 1s22s22p63s23p3 C 1s22s22p63s23p6 D 1s22s22p63s23p4 Cõu 36: Chn cu hỡnh electrron ca nguyờn t khớ him s cỏc cu hỡnh electron ca nguyờn t sau: A 1s22s22p63s23p1 B 1s22s22p63s23p3 C 1s22s22p63s23p6 D 1s22s22p63s23p4 Cõu 37: Cu hỡnh electron ca nguyờn t X l 1s 22s22p63s1 Bit rng X cú s l 24 thỡ ht nhõn ca X cú: A 24 proton B 11 proton, 13 ntron C 11 proton, s ntron khụng nh c D 13 proton, 11 ntron Cõu 38: Nguyờn t Y cú 3e phõn lp 3p, Y cú s hiu nguyờn t Z l A 17 B 13 C 15 D 16 Cõu 39: Nguyờn t Y cú 3e phõn lp 3d, Y cú s hiu nguyờn t (Z) l A 23 B 21 C 25 D 26 Cõu 40: Nguyờn t no sau õy cú s electron lp ngoi cựng nhiu nht A Ne(Z=10) B O(Z=8) C N(Z=7) D Cl(Z=17) Cõu 41: Cỏc electron ca nguyờn t X c phõn b trờn lp, lp th cú electron S n v in tớch ht nhõn ca nguyờn t ca nguyờn t X l A B C 14 D 16 Cõu 42: Nguyờn t no sau õy cú electron lp ngoi cựng? A 7N B 11Na C 13Al D 6C Cõu 43: Lp ngoi cựng cú 7e, thuc cu hỡnh electron no? A 1s22s22p63s23p5 B 1s22s22p63s23p64s1 C 1s22s22p63s23p3 D 1s22s22p63s2 Cõu 44: Nguyờn t ca nguyờn t X cú electron cui cựng in vo phõn lp 3p1 Nguyờn t ca nguyờn t Y cú electron cui cựng in vo phõn lp 3p3 S proton ca X v Y ln lt l : A 13 v 14 B 12 v 15 C 13 v 15 D 12 v 14 Cõu 45: Mt nguyờn t X cú s hiu nguyờn t Z =19 S lp electron nguyờn t X l A B C D Cõu 46: Nguyờn t ca nguyờn t nhụm cú 13e v cu hỡnh electron l 1s22s22p63s23p1 Kt lun no sau õy ỳng ? A Lp electron ngoi cựng ca nhụm cú 3e B Lp electron ngoi cựng ca nhụm cú 1e C Lp L (lp th 2) ca nhụm cú 3e D Lp M (lp th 2) ca nhụm cú 3e hay núi cỏch khỏc l lp electron ngoi cựng ca nhụm cú 3e Cõu 47: Mc nng lng ca cỏc electron trờn cỏc phõn lp s, p, d thuc cựng mt lp c xp theo th t : A d < s < p B p < s < d C s < p < d D s < d < p Cõu 48: Tng s ht nguyờn t ca mt nguyờn t l 40 Bit s ht ntron ln hn s ht pronton l Cho bit nguyờn t trờn thuc loi nguyờn t no? A nguyờn t s B nguyờn t p C nguyờn t d D nguyờn t f Cõu 49: Mt nguyờn t X cú tng s electron cỏc phõn lp s l v tng s electron lp ngoi cựng l Cho bit X thuc v nguyờn t hoỏ hc no sau õy? A Oxi (Z = 8) B Lu hunh (Z = 16) C Flo (Z = 9) D Clo (Z = 17) Cõu 50: Mt ngt X cú tng s e cỏc phõn lp p l 11 Hóy cho bit X thuc v nguyờn t hoỏ hc no sau õy? A nguyờn t s B nguyờn t p C nguyờn t d D nguyờn t f Cõu 51: Ion X2- v M3+ u cú cu hỡnh electron l 1s 22s22p6 X, M l nhng nguyờn t no sau õy ? A F, Ca B O, Al C S, Al D O, Mg Cõu 52: Dóy gm nguyờn t X, cỏc ion Y2+ v Z- u cú cu hỡnh electron : 1s22s22p63s23p6 l: A Ne, Mg2+, F- B Ar, Mg2+, F- C Ne, Ca2+, Cl- D Ar,Ca2+, Cl- Cõu 53: Cation R+ cú cu hỡnh electron phõn lp ngoi cựng l 2p Vy cu hỡnh electron ca nguyờn t R l A.1s22s22p5 B.1s22s22p63s2 C.1s22s22p63s23p1 D.1s22s22p63s1 Cõu 54: Ion M3+ cú cu hỡnh electron phõn lp ngoi cựng l 3d Vy cu hỡnh electron ca M l A 1s22s22p63s23p64s23d8 B 1s22s22p63s23p63d64s2 C 1s22s22p63s23p63d8 D 1s22s22p63s23p63d54s24p1 Cõu 56: Cu hỡnh e ca ion Mn2+ l : 1s22s22p63s23p63d5 Cu hỡnh e ca Mn l : A.1s22s22p63s23p63d7 C 1s22s22p63s23p63d54s2 B 1s22s22p63s23p64s24p5 D 1s22s22p63s23p63d34s24p2 Cõu 57: Cho bit cu hỡnh electron ca cỏc nguyờn t X : 1s 22s22p63s23p4 ; 1s22s22p63s23p64s2 ; Z : 1s22s22p63s23p6 Nguyờn t no l kim loi ? A X B Y C Z Y : D X v Y Cõu 58: Cho cỏc nguyờn t cú s hiu tng ng l X (Z = 11), Y (Z2 = 14), Z (Z3 = 17), T (Z4 = 20), R (Z5 = 10) Cỏc nguyờn t l kim loi gm : A Y, Z, T B Y, T, R C X, Y, T D X, T Cõu 59 : Cu trỳc electron no sau õy l ca phi kim: (1) 1s22s22p63s23p4 (4) [Ar]3d54s1 (2) 1s22s22p63s23p63d24s2 (5) [Ne]3s23p3 (3) 1s22s22p63s23p63d104s24p3 (6) [Ne]3s23p64s2 A (1), (2), (3) B (1), (3), (5) C (2), (3), (4) D (2), (4), (6) Cõu 60: Cho cỏc cu hỡnh electron sau: a 1s22s1 b 1s22s22p63s23p64s1 c 1s22s22p63s23p1 d 1s22s22p4 e 1s22s22p63s23p63d44s2 f 1s22s22p63s23p63d54s2 g 1s22s22p63s23p5 h 1s22s22p63s23p63d104s24p5 i 1s22s22p63s23p2 j 1s22s22p63s1 k 1s22s22p3 l 1s2 a/ Cỏc nguyờn t cú tớnh cht phi kim gm: A A ( c, d, f, g, k) B ( d, f, g, j, k) C ( d, g, h, k ) D ( d, g, h, i, k) b/ Cỏc nguyờn t cú tớnh kim loi : A ( a, b, e, f, j, l) B ( a, f, j, l) C ( a, b,c, e, f, j) D ( a, b, j, l) Bi chng Dng 1: Bi ng v-nguyờn t trung bỡnh Cõu 61 Nit thiờn nhiờn l hn hp gm hai ng v l 14 N (99,63%) v 15 N (0,37%) Nguyờn t trung bỡnh ca nit l A 14,7 B 14,0 C 14,4 Cõu 62 Tớnh ngt trung bỡnh ca Mg bit Mg cú ng v cũn li l 26 12 D 13,7 24 12 Mg ( 79%), 25 12 Mg ( 10%), Mg ? A 24,37 B 24,0 C 24,4 Cõu 63 Nguyờn t Cu cú hai ng v bn l l 63,54 T l % ng v 63 29 Cu , 65 29 63 29 Cu v 65 29 D 24,32 Cu Nguyờn t trung bỡnh ca Cu Cu ln lt l A 70% v 30% B 27% v 73% C 73% v 27% D 64% v 36 % Cõu 64 Nguyờn t Bo cú ng v 11B (x1%) v 10B (x2%), ngt trung bỡnh ca Bo l 10,8 Giỏ tr ca x1% l: A 80% B 20% C 10,8% Cõu 65 ng cú ng v 63 29 Cu ; 65 29 D 89,2% Cu , bit t l s nguyờn t ca chỳng ln lt l 105 : 245 Tớnh ngt trung bỡnh ca Cu ? A 64 B 64,4 Cõu 66 Clo cú hai ng v Clo l C 64,2 35 17 Cl (75,77%) v 37 17 D 64,3 Cl(24,23%) Nguyờn t trung bỡnh ca A 36,5 B 35,5 Cõu 67 ng cú ng v A.31,77 63 Cu v C 37,5 65 Cu(27%).Hi 0,5 mol Cu cú lng bao nhiờu gam? B 32 C 31,5 Cõu 68 Trong t nhiờn brom cú hai ng v 79 Br v Brom l 79,91 thỡ % hai ng v ny ln lt l: A 35% v 65% D 34,5 81 D.32,5 Br Nu nguyờn t trung bỡnh ca B 45,5% v 55,5% C 54,5% v 45,5% D 61,8% v 38,22% Cõu 69 Ngt X cú ng v , t l s ngt ca ng v 1, ng v l 31 : 19 ng v cú 51p, 70n v ng v th hn ng v l ntron Tỡm ngt trung bỡnh ca X ? A 121,38 B 122,21 C 120,38 D 121,28 Cõu 70 Trong t nhiờn bc cú hai ng v, ú ng v Ag chim 44% Bit AAg = 109 107,88 Nguyờn t ca ng v th hai ca Ag l bao nhiờu? A 106,78 B.107,53 C 107,00 D 108,23 Cõu 71 Nguyờn t ca mt nguyờn t X cú tng s cỏc loi ht bng 115 Trong ú tng s ht mang in l 70 ht Kớ hiu nguyờn t ca X l: A 80 35 X B 90 35 X C 45 35 X D 115 35 X Cõu 72 Mt nguyờn t cú s hiu 29, s 61 Nguyờn t ú cú: A 90 ntron B 61 ntron C 29 ntron D 29 electron Cõu 73 Mt nguyờn t ca mt nguyờn t cú tng s ht l 13.Vy nguyờn t ú cú s proton l : A B C D.7 Cõu 74 Mt nguyờn t ca mt nguyờn t cú tng s ht l 28.Vy nguyờn t ú cú s ntron l : A 10 B C D.7 Cõu 75 Nguyờn t trung bỡnh ca ng kim loi l 63,546 ng tn ti t nhiờn vi hai ng v l: A 27,30% 65 29 Cu , 63 29 Cu Thnh phn % ca ng B 26,30% B 35 Cu theo s nguyờn t l: C 26,7% Cõu 76 Trong t nhiờn Clo cú hai ng v bn: t trung bỡnh ca clo 35,5 A cú giỏ tr l: A 34 65 29 35 D 23,70% Cl chim 75% v A Cl chim 25% Nguyờn C 36 D 37 Cõu 77 Nguyờn t trung bỡnh ca Sb l 121,76 Sb cú ng v, bit 121 Sb chim 62% Tỡm s ca ng v th 2? A 123,0 B 122,5 C 124,0 D 121,0 Cõu 78: Trong t nhiờn, Clo cú ng v 35Cl v 37Cl, ú ng v chim 35Cl 75% v s ng v Phn trm lng ca 35Cl KClO4 l ( cho : K=39, O=16) : A 21,43% B 7,55% C 18,95% D 64,29% Cõu 79 (H - KB 2011) Trong t nhiờn Clo cú hai ng v bn: nguyờn t, cũn li l A 8,43% 35 17 Cl Thnh phn % theo lng ca B 8,79% Cõu 80: ng v oxi cú cỏc ng v sau: 37 17 63 Cu, 29 Cu ; 16 Cl chim 24,23% tng s Cl HClO4 l C 8,92% 65 29 37 17 D 8,56% O, 178 O, 188 O Cú th cú bao nhiờu loi phõn t ng(I) oxit khỏc to nờn t cỏc ng v ca hai nguyờn t ú ? A B C Cõu 81: Cacbon v oxi cú cỏc ng v sau: 12 C, 146 C ; 16 D 12 O, 178 O, 188 O Cú th cú bao nhiờu loi phõn t khớ cacbon ioxit khỏc to nờn t cỏc ng v ca hai nguyờn t ú ? A B 18 C D 12 DNG 2: TèM S P, E, N, S KHI A - VIT K HIU NGUYấN T Cõu 82 Nguyờn t ca nguyờn t X cú tng s ht l 40 Tng s ht mang in nhiu hn tng s ht khụng mang in l 12 ht Nguyờn t X cú s l : A 27 B 26 C 28 D 23 Cõu 83 Trong nguyờn t mt nguyờn t A cú tng s cỏc loi ht l 58 Bit s ht p ớt hn s ht n l ht Kớ hiu ca A l A 38 19 K B 39 19 K C 39 20 K D 38 20 K Cõu 84 Tng cỏc ht c bn mt nguyờn t l 155 ht Trong ú s ht mang in nhiu hn s ht khụng mang in l 33 ht S ca nguyờn t ú l A 119 B 113 C 112 D 108 Cõu 85 Tng cỏc ht c bn mt nguyờn t l 82 ht Trong ú s ht mang in nhiu hn s ht khụng mang in l 22 ht S p,n,e ln lt l A 26,30,26 B 26,27,30 C 30,26,26 D 25,25,31 Cõu 86 Ngt ca nguyờn t Y c cu to bi 36 ht Trong ht nhõn, ht mang in bng s ht khụng mang in S n v in tớch ht nhõn Z l : A 10 B 11 C 12 D.15 Cõu 87 Nguyờn t ca nguyờn t X cú tng s ht c bn l 49, ú s ht khụng mang in bng 34,69% s tng ht in tớch ht nhõn ca X l: A 18 B 17 C 15 D 16 Cõu 88 Nguyên tử nguyên tố X đợc cấu tạo 60 hạt, số hạt mang điện gấp đôi số hạt không mang điện Điện tích hạt nhân X là: A 20 B 12 C 15 D 18 Cõu 89 Nguyờn t ca mt nguyờn t cú 122 ht p,n,e S ht mang in nhõn ớt hn s ht khụng mang in l 11 ht S ca nguyờn t trờn l: A 122 B 96 C 85 D 74 Cõu 90 Nguyờn t X cú tng s ht p,n,e l 52 v s l 35 S hiu nguyờn t ca X l A 17 B 18 C 34 Cõu 91 Nguyờn t X cú tng s ht p, n, e l 28 ht Kớ hiu nguyờn t ca X l D 52 A D 16 B X 19 C X 10 X 18 X Cõu 92 Tổng số hạt proton, nơtron, electron nguyên tử nguyên tố 13 Số khối nguyên tử là: A B 10 C D Cõu 93 Tng cỏc ht c bn nguyờn tX (proton,ntron v electron) l 82 Bit cỏc ht mang in gp cỏc ht khụng mang in l 1,733 ln Tng s ht mang in nguyờn t X l: A 26 B 52 C 30 D 60 Cõu 94 Mt nguyờn t R cú tng s ht mang in v khụng mang in l 34 Trong ú s ht mang in gp 1,833 ln s ht khụng mang in Nguyờn t R l A Mg(24) B Na(23) C F(19) D Ne(20) Cõu 95 Trong nguyờn t Y cú tng s proton,ntron v electron l 26 Hóy cho bit Y thuc v loi nguyờn t no sau õy? ( Bit rng Y l nguyờn t húa hc ph bin nht v qu t) A 168 O B 178 O C 188 O D 199 F Cõu 96 Nguyờn t X cú tng s ht c bn (p + n + e) = 48 Bit nguyờn t X s ht proton bng s ht ntron Cu hỡnh ca X l A 1s22s22p4 B 1s22s22p63s23p4 C 1s22s22p63s2 D 1s22s22p63s1 Cõu 97 Mt nguyờn t ca mt nguyờn t cú tng s ht l 10.Vy nguyờn t ú cú cu hỡnh l : A 1s22s22p4 B 1s22s2 C 1s22s1 D 1s22s22p6 Cõu 98 Nguyờn t ca nguyờn t X cú tng s ht (p, n, e) bng 52 Trong ú cỏc ht mang in chim 65,3846% tng s ht Nguyờn t X l nguyờn t no? A 1s22s22p4 B 1s22s22p63s23p5 C 1s22s22p63s2 D 1s22s22p63s1 Cõu 99 Tng s ht mang in ion AB 43- l 50 S ht mang in nguyờn t A nhiu hn s ht mang in ht nhõn nguyờn t B l 22 S hiu nguyờn t A, B ln lt l: A 16 v B v 16 C 15 v D v 15 Cõu 100 Trong phõn t M2X cú tng s ht p,n,e l 140, ú s ht mang in nhiu hn s ht khụng mang in l 44 ht S ca M ln hn s ca X l 23 Tng s ht p,n,e nguyờn t M nhiu hn nguyờn t X l 34 ht CTPT ca M2X l: A K2O B Rb2O C Na2O D Li2O Cõu 101 Trong phõn t MX2 cú tng s ht p,n,e bng 164 ht, ú s ht mang in nhiu hn s ht khụng mang in l 52 ht S ca nguyờn t M ln hn s ca nguyờn t X l Tng s ht p,n,e nguyờn t M ln hn nguyờn t X l ht S hiu nguyờn t ca M l: A 12 B 20 C 26 D DNG TNH BN KNH, KHI LNG RIấNG NGUYấN T Cõu 102: Nguyờn t km cú bỏn kớnh r = 1,35.10 -1 nm v cú lng nguyờn t l 65 u Bit tinh th, cỏc nguyờn t km ch chim 68,2% th tớch, phn cũn li l khụng gian rng Khi lng riờng ca km tớnh theo lớ thuyt l A 7,12 g/cm3 B 7,14 g/cm3 C 7,15 g/cm3 D 7,30 g/cm3 O Cõu 103: Nguyờn t nhụm cú bỏn kớnh r = 1,43 A v cú lng nguyờn t l 27 u Khi lng riờng ca nguyờn t nhụm l A 3,86 g/cm3 B 3,36 g/cm3 C 3,66 g/cm D 2,70 g/cm3 Cõu 104: Bỏn kớnh gn ỳng ca ht ntron l 1,5.10 -15 m, cũn lng ca mt ht ntron bng 1,675.10-27kg Khi lng riờng ca ntron l A 123.106 kg/cm3 B 118.109 kg/cm3 C 120.108 g/cm3 D 118.109 g/cm3 Cõu 105: Khi lng riờng ca canxi kim loi l 1,55 g/cm3 Gi thit rng, tinh th canxi cỏc nguyờn t l nhng hỡnh cu chim 74% th tớch tinh th, phn cũn li l khe rng Bỏn kớnh nguyờn t canxi tớnh theo lớ thuyt l A 0,155 nm B 0,196 nm C 0,185 nm D 0,168 nm Cõu 106: Hiro cú nguyờn t trung bỡnh l 1,008 Trong nc, hiro ch yu tn ti hai ng v l 11 H v 12 H S nguyờn t ca ng v 12 H 1ml nc l (cho s Avogaro bng 6,022.1023 , lng riờng ca nc l g/ml) A 5,33.1020 B 4,53.1020 C 5,35.1020 D 4,55.1020  ... D 52 A D 16 B X 19 C X 10 X 18 X Cõu 92 Tổng số hạt proton, nơtron, electron nguyên tử nguyên tố 13 Số khối nguyên tử là: A B 10 C D Cõu 93 Tng cỏc ht c bn nguyờn tX (proton,ntron v electron)... s ht khụng mang in bng 34,69% s tng ht in tớch ht nhõn ca X l: A 18 B 17 C 15 D 16 Cõu 88 Nguyên tử nguyên tố X đợc cấu tạo 60 hạt, số hạt mang điện gấp đôi số hạt không mang điện Điện tích hạt