Atoms

Question 1

Subatomic particles which make up atoms

Answer 1

Incredibly small
Make up everything
Atoms are made up of:
Protons
Neutrons
Electrons

Question 2

Define proton (+)

Answer 2

A small, positively charged particle of matter found in the atom of all elements.
Slightly smaller than neutron.

Question 3

Define neutron (o)

Answer 3

An uncharged elementary particle

Has a mass nearly equal to that of the proton

Is present in all known atomic nuclei except the hydrogen nucleus.

Slightly larger than proton.

Question 4

Define electron (-)

Answer 4

An elementary particle that has a negative charge of electricity.

Travels around the nucleus of an atom.

About 1000 times smaller than protons.

Question 5

How do atoms become ions?

Answer 5

When an atom gains or loses electrons.

Question 6

Define ions

Answer 6

When atoms gain or lose electrons, they become ions. These are how chemical reactions occur.

Question 7

Define atom

Answer 7

An atom is defined as the smallest unit of matter invisible by chemical means.

A fundamental building block of chemical elements.

Atoms make up everything and are composed of protons, neutrons and electrons.

Question 8

How to determine number of electrons in atom?

Answer 8

of electron

# of proton = # of electron
Positively charged ion = # of proton - # of lost electron
Negatively charged ion = # of proton + # of gained electrons