Atomic Structure MCQ

Consider the composition of the species W, X, Y and Z shown here. Which species is an anion?

• W

• X

• Y

• Z

Energy levels for an electron in a hydrogen atom are

• evenly spaced.

• farther apart near the nucleus.

• closer together near the nucleus.

• arranged randomly.

Which is related to the number of electrons in the outer main energy level of the elements from the alkali metals to the halogens?

• I only

• II only

• Both I and II

• Neither I and II

What is the electron configuration for an atom with Z = 22?

• 1s²2s²2p⁶3s²3p⁶3d⁴

• 1s²2s²2p⁶3s²3p⁶4s²4p²

• 1s²2s²2p⁶3s²3p⁶3d²4p²

• 1s²2s²2p⁶3s²3p⁶4s²3d²

What is the correct number of each particle in a fluoride ion, ¹⁹F^–?

• A

• B

• C

• D

Which statement is correct for the emission spectrum of the hydrogen atom?

• The lines converge at lower energies.

• The lines are produced when electrons move from lower to higher energy levels.

• The lines in the visible region involve electron transitions into the energy level closest to the nucleus.

• The line corresponding to the greatest emission of energy is in the ultraviolet region.

What is the correct sequence for the processes occurring in a mass spectrometer?

• vaporization, ionization, acceleration, deflection

• vaporization, acceleration, ionization, deflection

• ionization, vaporization, acceleration, deflection

• ionization, vaporization, deflection, acceleration

How many valence electrons are present in an atom of an element with atomic number 16?

• 2

• 4

• 6

• 8

What is the total number of p orbitals containing one or more electrons in germanium (atomic number 32)?

• 2

• 3

• 5

• 8

Information is given about four different atoms shown here. Which two atoms are isotopes?

• W and Y

• W and Z

• X and Z

• X and Y