Review Unit 1: Atomic Structure 24_25 (7th)

Front

What identifies an element in an atom?

Back

The number of protons in the atom's nucleus identifies the element.

Front

What happens when an electron absorbs energy?

Back

The electron becomes excited and moves to a higher energy level.

Front

What occurs when an excited electron falls back to its original energy level?

Back

It emits a photon of light.

Front

What is the significance of groups in the periodic table?

Back

Elements in the same group have similar properties due to having the same number of valence electrons.

Front

What does electron configuration notation represent?

Back

It represents the distribution of electrons among the orbitals of an atom.

Front

What is nuclear charge?

Back

Nuclear charge is the total charge of the nucleus, determined by the number of protons.

Front

How does the number of neutrons affect the atomic mass?

Back

Increasing the number of neutrons increases the atomic mass, but does not change the nuclear charge.

Front

What is an isotope?

Back

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

Front

What is the principal energy level in an atom?

Back

The principal energy level indicates the main energy shell where electrons reside.

Front

What is the role of electrons in chemical bonding?

Back

Electrons, particularly valence electrons, are involved in forming chemical bonds between atoms.