Atomic Structure and Periodic Table

Front

What is an atom?

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

Front

What is the atomic number?

Back

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

Front

What is the atomic mass?

Back

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

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

Front

What is a period in the periodic table?

Back

A horizontal row of elements in the periodic table, indicating the 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 that share similar chemical properties.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom, contributing to atomic mass.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom in electron shells.

Tags

NGSS.MS-PS2-3

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Tags

NGSS.HS-PS1-8