Test on Atoms, Elements, Molecules, and Compounds

Who is credited with the idea that atoms are the smallest part of matter that cannot be divided further?

• Dalton

• Thompson

• Democritus

• Rutherford

Tags

NGSS.HS-PS1-7

What did Dalton propose about atoms of an element?

• They are different and cannot be rearranged.

• They are identical and are rearranged during a chemical reaction.

• They have a dense positively charged core.

• They are made of smaller particles called electrons.

Tags

NGSS.HS-PS1-7

What did Thompson discover about atoms?

• Atoms have a dense positively charged core.

• Atoms have negatively charged particles called electrons.

• Atoms are indivisible.

• Atoms are identical and rearrange during reactions.

What is the charge of a neutron?

• Positive charge

• Negative charge

• No charge

• Double charge

How many electrons are needed to equal the mass of one proton or one neutron?

• 1

• 1840

• 1000

• 500

What is the atomic number of an atom?

• The number of electrons

• The number of protons

• The number of neutrons

• The number of molecules

Tags

NGSS.MS-PS1-1

What is the atomic mass of an atom?

• The number of electrons

• The number of protons and neutrons

• The number of protons

• The number of molecules

Tags

NGSS.MS-PS1-5

What are elements made of?

• Different types of atoms

• Only one type of atom

• Molecules

• Compounds

Tags

NGSS.MS-PS1-1

What are molecules made of?

• Atoms joined chemically

• Single atoms

• Neutrons and protons

• Electrons only

Tags

NGSS.MS-PS1-1

Where are all the elements found?

• In the atomic mass

• In the atomic number

• In the periodic table

• In molecules