Atoms, Elements and Compounds

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Tags

NGSS.MS-PS1-1

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for water?

Back

H₂O

Tags

NGSS.MS-PS1-1

Front

What is the electron cloud?

Back

The region around the nucleus of an atom where electrons are likely to be found.

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.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Tags

NGSS.MS-PS2-3

Front

How many protons are in a hydrogen atom?

Back

1 proton.

Front

What is the atomic number?

Back

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