What is an atom?

• the smallest particle of a substance

• the largest particle of a substance

• it is a chemical

• a very tiny germ

Tags

NGSS.5-PS1-1

An atom is made up of parts that determine what the atom is, its mass, and how it behaves.

• True

• False

Tags

NGSS.5-PS1-1

Atoms are made up of __________________________.

• germs, red bloods cells, and liver

• elements

• molecules and mixtures

• protons, neutrons, & electrons

Tags

NGSS.5-PS1-1

A proton has a _________ charge.

• negative

• positive

• neutral

A neutron has a _________ charge.

• negative

• positive

• neutral

An electron has a _________ charge.

• negative

• positive

• neutral

Tags

NGSS.MS-PS2-3

Which two parts of the atom are in the nucleus?

• protons and electrons

• electrons and neutrons

• neutrons and protons

• neutrons and elements

The atomic number of an element represents the ___________________.

• number of molecules

• number of protons

• number of electrons

• number of neutrons

There are over _______ know elements.

• 50

• 75

• 200

• 100

The Periodic Table of Elements was developed by a Russian Chemist named ____________________.

• George Washington

• Dmitri Mendeleev

• The Science Kid

• Bill Nye