Unit 2 Exam

Front

What subatomic particles make up the majority of the mass of an atom?

Back

The protons and the neutrons.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How do you determine if two atoms are isotopes of one another?

Back

Two atoms are isotopes if they have the same number of protons but different numbers of neutrons.

Front

What element has 8 protons?

Back

Oxygen.

Front

What is the highest energy subshell in the following options: 3s, 4p, 4d, 5s?

Back

4d.

Front

What group is calcium in on the periodic table?

Back

Group 2.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.

Front

What is the electron configuration for oxygen?

Back

1s² 2s² 2p⁴.