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- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following is the electronic configuration of the bromine atom?

1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}4p^{6}1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{7}1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{5}1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{6} - Multiple ChoicePlease save your changes before editing any questions.
To which one of the following energy levels (denoted by n) does the electron in a hydrogen atom return when the emission spectrum is in the ultraviolet region;

n= 1

n = 2

n = 3

n = 4

- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following does

**not**represent the electronic configuration of an atom in its ground state?1s

^{2}2s^{2}2p^{3 }1s

^{2}2s^{2}2p^{4}1s

^{2}2s^{2}2p^{6}3s^{1 }1s

^{2}2s^{2}2p^{6}3d^{1} - Multiple ChoicePlease save your changes before editing any questions.
Which one of the following is the maximum number of atomic orbitals having a principal quantum number of two?

2

4

8

9

- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following contains no unpaired electrons in the ground state?

Be

F

Si

N

- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following is the electronic structure of a metal with a maximum oxidation state of +3?

1s

^{2}2s^{2}2p^{6}3s^{1 }1s

^{2}2s^{2}2p^{6}3s^{2}3p^{4}1s

^{2}2s^{2}2p^{6}3s^{2}3p^{1}1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2} - Multiple ChoicePlease save your changes before editing any questions.
Which of the following statements regarding electronic orbitals is/are correct?

Each p-orbital can hold a maximum of six electrons.

The 3p-orbitals have a higher energy level than the 3s-orbital.

The three 3p-orbitals have slightly different energy levels.

The 1s-orbital has the same size and shape as the 2s-orbital.

- Multiple ChoicePlease save your changes before editing any questions.
The number of electrons in the

*3d*orbital of the atom of atomic number 27 is5

6

7

10

- Multiple ChoicePlease save your changes before editing any questions.
The vanadium atom (atomic number 23) in its ground state has the electronic configuration:

1s

^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{3}4s^{2}1s

^{2}2s^{2 }2p^{6}3s^{2}3p^{6}3d^{2}4s^{3}1s

^{2}2s^{2 }2p^{6}3s^{2}3p^{6}3d^{1 }4s^{2}4p^{2}1s

^{2}2s^{2 }2p^{6}3s^{2}3p^{6 }3d^{2}4s^{2}4p^{1} - Multiple ChoicePlease save your changes before editing any questions.
Which one of the following compounds contains two ions with different electronic configurations?

CaCl

_{2}MgF

_{2}MgO

NaCl