Honors Chemistry — Unit 1 Quiz Review (Metric, Measurement & Atoms)

Metric prefixes

kilo → hecto → deka → base → deci → centi → milli

Base units

meter (m) = length; liter (L) = volume; gram (g) = mass

Significant figures

All certain digits + 1 estimated digit.

Graduated cylinder

Used to measure volume.

Meniscus

Read the bottom of the meniscus.

Accuracy

Close to the actual value.

Precision

Close to each other.

Proton

+1 charge; relative mass = 1

Neutron

neutral charge, relative mass 1

Electron

−1 charge; relative mass 0.0005

Atomic number

Number of protons.

Mass number

Protons + neutrons.

Neutrons

Mass number − atomic number.

Neutral atom

Protons = electrons.

Isotopes

Same protons, different neutrons.

Average atomic mass

Weighted average of an element's isotopes.

Average atomic mass formula

(isotope mass × decimal abundance) + (isotope mass × decimal abundance) + …

Where is mass number located on an element?

Top left

Where is Atomic number located on an element?

Bottom left

Beaker

Used for measuring volume

Erlenmeyer Flask

NOT for pouring or measuring volume