Matter on the Atomic Scale

What is chemistry

The science of matter and the changes it undergoes

What are significant figures (sig figs)

The digits in a number that carry meaning in terms of precision

Are zeros at the start of a number for significant figures, significant or not

Not significant

When multiplying/dividing, how do you decide sig figs

Use the same number of sig figs as the value with the fewest sig figs

What is precision

When the numbers are close to each other

What is accuracy

When the numbers are closer to the true value

What is matter

Anything with mass and volume

What are elements

substances made of one type of atom

what is a compound

two or more different atoms bonded in a fixed ratio

What is a pure substance

A compound with the same composition (same elements)

What is a mixture substance

A compound with a variable composition (mixed elements)

What are the states of matter?

Solid, liquid, gas

What are the particle arrangement for solids

tightly packed

What are the particle arrangement for liquids

loosely packed

What are the particle arrangement for gas

widely spaced

What is the equation for density?

Mass ÷ Volume

What is the SI unit for temperature

Kelvin (K)

How do you convert C to K

K = C + 273.15

How do you convert C to F

F=(9/5 x C) +32