Periodic Table

Front

What is the Periodic Table?

Back

A tabular arrangement of chemical elements, organized by increasing atomic number, which shows the relationships between them.

Front

What is a period in the Periodic Table?

Back

A horizontal row of elements in the Periodic Table, where elements have the same number of electron shells.

Front

What is a group (or family) in the Periodic Table?

Back

A vertical column of elements in the Periodic Table, where elements have similar chemical properties and the same number of valence electrons.

Front

What is an isotope?

Back

A version of an element with the same number of protons but a different number of neutrons.

Front

What determines the identity of an atom?

Back

The number of protons in its nucleus.

Front

What does the atomic number represent?

Back

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

Front

How are elements organized in the Periodic Table?

Back

By increasing atomic number.

Front

What is the atomic mass?

Back

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

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is a chemical symbol?

Back

A one or two-letter abbreviation used to represent an element on the Periodic Table.