Atomic Math Practice

What is the atomic mass of sodium?

• 22

• 23

• 24

• 25

What is the electron configuration of sodium?

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 4s¹

How many electrons does Fluorine have?

• 7

• 8

• 9

• 10

Define atomic mass.

• The total number of protons in an atom.

• The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

• The mass of a single proton in atomic mass units.

• The mass of an atom measured in grams.

What is the significance of the periodic table?

• It organizes elements based on their atomic number and properties, showing trends in behavior.

• It lists all known elements in alphabetical order.

• It provides a visual representation of chemical reactions.

• It categorizes elements based on their color and size.

What is the role of electrons in chemical bonding?

• Electrons in the outer shell (valence electrons) are involved in forming bonds between atoms.

• Electrons are responsible for the mass of the atom.

• Electrons are only found in the nucleus of the atom.

• Electrons do not play a role in chemical reactions.

What is the atomic number of Boron?

• 3

• 4

• 5

• 6

What is the difference between a cation and an anion?

• A cation is a negatively charged ion, while an anion is a positively charged ion.

• A cation is a positively charged ion, while an anion is a negatively charged ion.

• Cations and anions are both neutral ions with no charge.

• Cations are larger than anions in size.

What is the charge of an electron?

• +1

• 0

• -1

• -2

What is the atomic mass of Fluorine?

• 16

• 18

• 19

• 20