Which one of the following is the electronic configuration of the bromine atom?

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹4p⁶

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁷

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁵

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶

Tags

NGSS.HS-PS1-1

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

Tags

NGSS.HS-PS4-4

Which one of the following does not represent the electronic configuration of an atom in its ground state?

• 1s² 2s² 2p³

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3d¹

Tags

NGSS.HS-PS1-1

Which one of the following is the maximum number of atomic orbitals having a principal quantum number of two?

• 2

• 4

• 8

• 9

Which one of the following contains no unpaired electrons in the ground state?

• Be

• F

• Si

• N

Tags

NGSS.HS-PS1-1

Which one of the following is the electronic structure of a metal with a maximum oxidation state of +3?

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s² 3p⁴

• 1s² 2s² 2p⁶ 3s² 3p¹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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.

The number of electrons in the 3d orbital of the atom of atomic number 27 is

• 5

• 6

• 7

• 10

Tags

NGSS.HS-PS1-1

The vanadium atom (atomic number 23) in its ground state has the electronic configuration:

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s³

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹ 4s² 4p²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s² 4p¹

Tags

NGSS.HS-PS1-1

Which one of the following compounds contains two ions with different electronic configurations?

• CaCl₂

• MgF₂

• MgO

• NaCl

Tags

NGSS.HS-PS1-1