IB Chemistry Multiple Choice Review

Consider the composition of each species below. Which is an anion?

• 9 protons, 10 neutrons, 10 electrons

• 11 protons, 12 neutrons, 11 electrons

• 12 protons, 12 neutrons, 12 electrons

• 13 protons, 14 neutrons, 10 electrons

Tags

NGSS.HS-PS1-1

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. Group number

II. Period number

• I only

• II only

• Both I and II

• Neither I nor II

Tags

NGSS.HS-PS1-1

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

• protons 9, neutrons 10, electrons 8

• protons 9, neutrons 10, electrons 9

• protons 9, neutrons 10, electrons 10

• protons 9, neutrons 19, electrons 10

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.

Tags

NGSS.HS-PS4-3

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

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

A certain sample of element Z contains 60% of 69Z and 40% of 71Z. What is the relative atomic mass of element Z in this sample? Round to 3 sig figs and use ONLY THE NUMBERS, NO UNITS

What is the difference between two neutral atoms represented by the symbols ⁵⁹₂₇ Co and ⁵⁹₂₈Ni?

• The number of neutrons only.

• The number of protons and electrons only.

• The number of protons and neutrons only.

• The number of protons, neutrons and electrons.

How many electrons are there in one ²⁴₁₂ Mg²⁺ ion?

• 10

• 12

• 14

• 22

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The electron arrangement of sodium is 2.8.1. How many occupied main electron energy levels are there in an atom of sodium?

• 1

• 3

• 10

• 11

Tags

NGSS.HS-PS1-1