Atoms, Molecules, Compounds

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 is a molecule?

Back

A molecule is a group of two or more atoms bonded together. Molecules can consist of the same or different elements.

Tags

NGSS.MS-PS1-1

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements chemically bond together in fixed proportions.

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NGSS.MS-PS1-1

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals. Examples include boron and antimony.

Front

Is Sodium (Na) an element or a compound?

Back

Sodium (Na) is an element.

Front

What is the difference between a molecule and a compound?

Back

All compounds are molecules, but not all molecules are compounds. A molecule can consist of the same type of atoms, while a compound consists of different types of atoms.

Tags

NGSS.MS-PS1-1

Front

What is the chemical symbol for Hydrogen?

Back

The chemical symbol for Hydrogen is H.

Front

What is carbon dioxide?

Back

Carbon dioxide (CO2) is a compound formed when one carbon atom chemically combines with two oxygen atoms.

Tags

NGSS.MS-PS1-1

Front

What are the main components of an atom?

Back

The main components of an atom are protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

Front

What is the periodic table?

Back

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