A:Bohr model B:Schrodinger equation C:Rutherford model D:Dirac equation 答案: Dirac equation Which field is not related A:Bohr model B:Schrodinger equation C:Rutherford model D:Dirac equation 答案: Dirac equation Which field is not related 2022-02-08 7
A:Plato B:Aristotle C:Democracy D:Archimedes 答案: Democracy Who did firstly show the Periodic table? ( ) A:Plato B:Aristotle C:Democracy D:Archimedes 答案: Democracy Who did firstly show the Periodic table? ( ) 2022-02-06 9
A:titanium B:aluminum C:silver D:gold 答案: gold For aluminum ( Z2 = 13) and gold ( Z2 = 79 )targets, what is the ratio A:titanium B:aluminum C:silver D:gold 答案: gold For aluminum ( Z2 = 13) and gold ( Z2 = 79 )targets, what is the ratio 2021-12-31 4
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 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 2021-12-31 12
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 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 2021-12-31 7
A:91.2 nm B:15 mm C:49 fm D:357 nm 答案: 91.2 nm A beam of electrons bombards a sample of hydrogen. Through what potential A:91.2 nm B:15 mm C:49 fm D:357 nm 答案: 91.2 nm A beam of electrons bombards a sample of hydrogen. Through what potential 2021-12-01 9
A:The atom is mainly empty space B:The nucleus must be positively charged C:The nucleus must be very small compared to A:The atom is mainly empty space B:The nucleus must be positively charged C:The nucleus must be very small compared to 2021-12-01 6
A:nucleus B:outer environment C:shell D:space 答案: nucleus Which of the following is not a valid conclusion from Rutherf A:nucleus B:outer environment C:shell D:space 答案: nucleus Which of the following is not a valid conclusion from Rutherf 2021-11-30 12
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 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 2021-11-30 5
According to structure of atom electron should fall in ( )? According to structure of atom electron should fall in ( )? 2021-11-29 10
A:2h B:2p/h C:h/2p D:h/p 答案: h/2p The ratio of the speed of the electron in the ground state of hydrogen atom to the spe A:2h B:2p/h C:h/2p D:h/p 答案: h/2p The ratio of the speed of the electron in the ground state of hydrogen atom to the spe 2021-11-29 11
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 ( 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 ( 2021-11-29 7
