A:1.35 B: 0.67 C:0.05 D:0.84 答案: 0.84 When an electron jumps from its orbit to another orbit, energy is ( ). 点我阅读全文
A:distance between the two energy levels B:number of electrons in the energy levels C:distance from the nucleus D:numbe 点我阅读全文
A:n2 B: n C:1/n D:1/n2 答案: n2 In hydrogen atom the angular momentum of the electron in the lowest energy state ( 点我阅读全文
A:2/137 B:1/237 C:1/2 D:1/137 答案: 1/137 If the electron in hydrogen atom jumps from the third orbit to second orbit, 点我阅读全文
A:36/5R B:5/R C:5R/36 D:R/6 答案: 36/5R A proton and an electron, both at rest initially, combine to form a hydrogen atom 点我阅读全文
A:36/5R B:5/R C:5R/36 D:R/6 答案: 36/5R A proton and an electron, both at rest initially, combine to form a hydrogen atom 点我阅读全文
A:nucleus B:outer environment C:shell D:space 答案: nucleus Which of the following is not a valid conclusion from Rutherf 点我阅读全文
A:10° B:Plasma physics C:Astrophysics D: Environment 答案: 10° What fraction of a beam of 7.7-MeV alpha particles inci 点我阅读全文
A:The atom is mainly empty space B:The nucleus must be positively charged C:The nucleus must be very small compared to 点我阅读全文
A:569.3 V B:35.7 V C:0.6 V D:12.1 V 答案: 12.1 V The longest wavelength in the Lyman series is 121.5 nm and the shortes 点我阅读全文
A:49.4 fm B:91.13 nm C:74.5 mm D:8.3 nm 答案: 91.13 nm What is the shortest wavelength present in the Brackett series of s 点我阅读全文
A:Einstein B:Pauli C:Fermi D:Schrodinger 答案: EinsteinState the mass of Avogadro’s number of atoms for Copper ( ). 点我阅读全文
A:127.10 g B:63.55 kg C:23.22 g D:63.55 g 答案: 63.55 g The mass of a single iron atom is 9.3 × 10–23 g. Determine the nu 点我阅读全文
A:134.5 B:0.03 C:36.93 D:1.47 答案: 36.93For an 8.0-MeV α particle scattering from a gold atom ( Z = 79 ) of radius 0.13 点我阅读全文
A: 0.511 MeV B:1.673× 10-24 g C:3.344× 10-27 kg D:10.07 u 答案: 1.673× 10-24 g In Rutherford atomic model alpha particles 点我阅读全文
A:titanium B:aluminum C:silver D:gold 答案: gold For aluminum ( Z2 = 13) and gold ( Z2 = 79 )targets, what is the ratio 点我阅读全文