Chemistry Review for AP Biology

Anything that takes up space and has mass:

• Compound

• Matter

• Element

• Atom

Cannot be broken down into another substance by a chemical reaction

• Compound

• Matter

• Element

• Atom

Tags

NGSS.HS-PS1-7

2 or more elements combined in a fixed ratio

• Matter

• Compound

• Suspension

• Isotope

Smallest unit of matter that still retains the properties of an element

• Atom

• Ion

• Isotope

• Compound

Tags

NGSS.MS-PS1-5

Positive charge, found in nucleus, 1 amu (dalton)

• Proton

• Neutron

• Electron

Negative charge, found in orbit around the nucleus, mass is negligible

• Proton

• Neutron

• Electron

No charge, found in nucleus, 1 amu (dalton)

• Proton

• Neutron

• Electron

Atomic Number

• = Number of Protons in the Nucleus

• = Number of Protons + Neutrons

Tags

NGSS.MS-PS1-1

Atomic Mass

• = Number of Protons in the Nucleus

• = Number of Protons + Neutrons

Tags

NGSS.MS-PS1-5

Same number of Protons, but different number of neutrons

• Isotope

• Ion

• Compound