Respuesta :
Answer:
11. What is the value of "l'azimuthal quantum number permitted for an electron with n-4
C. 1,2,3,4
A. 1.2.3
8.0.1.2.3
D. 0.1,2,3,4
D. S-block
12. Group IA and IIA elements are ...
B. d-block
C. f-block
A. P-block
13. The maximum number of elecrons that occopy an orbital is ---
A. 8
B: 10
C. 2
D. 14
.....-14. Which postulates of John Dalton is still acceptabel?
A. Atoms are indivisibel
B. Atoms of different elements are different
C. Atoms os the same element is the same
D. All of the above
--15. Calculate the energies of the state of the hyderogen atom n-2 and n=3 (RH=-2.18X101J)
A 3.03X10)
B.4.02X10
)
C.5.02X10J
D. 8X1091
16. An atoms has atomic number 31 and mass number 70 How many electrons will it have in its valence shall?
A5
B4
C3
D. 2
17. The orbital that has sphrical symmetry shape is---
A. P-orbital
B. d-orbital
C. f-orbital
D. S-orbital
18 Which of the quantum numbers relates to the electron only?
A. n
B.1
C. ms
D. ml
11 Short answer
19. Write the group for the element whose electron configuration 1s², 2s², 2p Answer Group .....
20. The spontaneous emission of energy from unstabel atom is known as
