Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is made up of atoms that have the same number of protons.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in fixed proportions. Compounds have different properties than the elements that make them up.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for table salt?

Back

The chemical formula for table salt is NaCl, which consists of sodium (Na) and chlorine (Cl) in a 1:1 ratio.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for methane?

Back

The chemical formula for methane is CH4, which consists of one carbon (C) atom and four hydrogen (H) atoms.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for oxygen gas?

Back

The chemical formula for oxygen gas is O2, indicating that it is made up of two oxygen (O) atoms.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2, which consists of one carbon (C) atom and two oxygen (O) atoms.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for nitrogen gas?

Back

The chemical formula for nitrogen gas is N2, indicating that it is made up of two nitrogen (N) atoms.

Tags

NGSS.MS-PS1-1

Front

What is the difference between an element and a compound?

Back

An element is a single type of atom, while a compound is made up of two or more different types of atoms chemically bonded together.

Front

What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties, consisting of two or more atoms bonded together.

Tags

NGSS.MS-PS1-1

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance, resulting in the formation of new substances.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5