Chapter 2 Review and Vocab (Chemistry of Life)

What did Democritus call the smallest fragment of any substance or basic unit of matter?

• molecule

• compound

• electrons

• atom

What forms when forces bind protons and neutrons together?

• molecule

• substance

• nucleus

• complicated thing

e- means...

• proton

• neutron

• electron

• negative charge

p+ means...

• neutron

• small particle

• proton

• electron

Proton has a ___________ charge.

Neutrons are

• n0

• neutral

• positive

• weigh less than protons

Electrons are constantly in motion in the space surrounding the nucleus.

• True

• False

In the first electron orbital, the max number of e- is?

• 3

• 5

• 8

• 2

The max number of e- in the second electron orbital is 9.

• True

• False

A pure substance that consists of entirely one type of atom.

• compound

• cation

• anion

• element