Chapter 4 Periodic Table Review

Front

What are valence electrons?

Back

Valence electrons are the subatomic particles found in the outermost shell of an atom, responsible for the atom's reactivity.

Front

How does atomic radius change across the periodic table?

Back

Atomic radius generally increases as we move down a group and from right to left across a period.

Front

Why do atoms get bigger as you move down the periodic table?

Back

Atoms get bigger because they have more energy levels.

Front

What is the noble gas shorthand electron configuration for a Sulfur atom?

Back

[Ne] 3s² 3p⁴

Front

What is the charge of an atom that has lost one electron?

Back

+1

Front

What is the definition of atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an ion and an atom?

Back

An ion is an atom that has gained or lost electrons, resulting in a net charge, while an atom is neutral.

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

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table that contains elements with similar chemical properties.

Front

What is a period in the periodic table?

Back

A period is a horizontal row in the periodic table that indicates the number of energy levels in the atoms.