Atoms and Periodic Table Review

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Tags

NGSS.MS-PS1-1

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom. The number of protons determines the element's identity.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom. They contribute to the atomic mass but do not affect the charge.

Tags

NGSS.HS-PS1-8

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom. They are involved in chemical bonding.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS2-3

Front

What is the 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 mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does Helium (He) have?

Back

Helium has 2 valence electrons.

Tags

NGSS.HS-PS1-1

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, which shows the relationships between them.

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.