Chemistry, Grade 7

What are the characteristics of matter?

• Has mass.

• Takes up space.

• Is important to people.

• Has color.

What is true of a neutron?

• It is a neutral color.

• It has no electric charge.

• It is found inside the nucleus.

• It is responsible for the atomic number.

What is true of an electron?

• It is found inside the nucleus.

• It has a mass of 0.

• It orbits in a cloud.

• It has a negative charge.

Tags

NGSS.MS-PS2-3

What is true of a proton?

• It has a positive charge.

• It has a negative charge.

• It is found in the nucleus with neutrons.

• It has a mass of 1.

What is true of an element?

• It has only one kind of matter in it.

• It can have the same atomic number as other elements.

• It is made up of identical atom.

• It can be made of different kinds of atoms.

This is a substance that has two or more kinds of atoms in it.

• Nucleus

• Atom

• Compound

• Element

The smallest unit of a substance that still has the characteristics of that substance

• Nucleus

• Compound

• Element

• Atom

The nucleus is made of

• protons, neutrons, and electrons.

• protons.

• protons and neutrons.

• neutrons.

Atomic number is the

• number of different elements in a compound.

• number of protons plus neutrons in an atom.

• number of protons in an atom (which is also the number of electrons)

• number of protons in an atom.

Tags

NGSS.HS-PS1-7

Atomic mass (or mass number) is the

• number of protons in an atom.

• number of protons plus neutrons in an atom.

• number of electrons plus protons in an atom.

• number that tells which element it is.