Atoms Molecules Elements Compounds

What is at the center of every atom?

• nuclear

• nucleus

• electron

• molecule

_ and _ make up the nucleus of an atom.

An electron of an atom...

• lives inside the nucleus and has a neutral charge.

• circles the nucleus and has a positive charge.

• lives inside the nucleus and has a negative charge.

• circles the nucleus and has a negative charge.

The number of protons in an atom is equal to the number of _ .

The number of _ determines the type of element an atom makes.

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NGSS.MS-PS1-1

When two or more atoms combine, a _ forms.

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NGSS.MS-PS1-1

What is a compound?

• A molecule that is formed from two different elements/atoms.

• A molecule that is formed from two or more of the same element/atom.

• A tiny atom that makes up an atom.

• The center of an atom that is formed by neutrons. protons, and electrons.

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NGSS.MS-PS1-1

Which of the following cannot be broken down into something simpler?

• a compound

• an element

• a chemical formula

• a mixture

A _ is like a recipe because it tells which elements make up a molecule.

Tags

NGSS.MS-PS1-1

The following can be found on the Periodic Elements...

• The number of atoms in a carbon dioxide molecule.

• All the compounds that exist in the natural world.

• The chemical formula for water.

• All the elements that have been discovered or created in a lab.

Tags

NGSS.MS-PS1-1