AP Bio - Ch. 2

A substance made of only one type of atom that cannot be broken down by chemical means

• compound

• element

• electron

• molecule

The smallest basic unit of matter is a(n)

• element

• atom

• molecule

• speck

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

• proton

• neutron

• electron

• valence

A subatomic particle that has no charge and that is found in the nucleus of an atom

• electron

• neutron

• shell

• proton

Tags

NGSS.HS-PS1-8

An atom that has gained or lost one or more electrons

• ion

• electron

• neutron

• bond

Chemical bond formed when two atoms share one or more pares of electrons

• ionic bond

• Bail bond

• covalent bond

• electron bond

Tags

NGSS.HS-PS1-1

Substance that is changed by a chemical reaction

• reactant

• rotation

• restoration

• relaxation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The image shows the periodic grid for POTASSIUM. what is Potassium's atomic number?

• 19

• 20

• 39

• impossible to tell

Tags

NGSS.HS-PS1-1

An ionic bond forms when atoms _______ electrons.

• gain

• increase

• share

• transfer

What makes a molecule polar?

• Equal sharing of valence electrons
• Unequal sharing of valence electrons
• Stealing of electrons
• Temporary charges that come and go