Ch 2/4 Flashcards
0
Q
What is the measure of a quantity of matter?
A
Mass
1
Q
What is an atom?
A
The smallest unit of matter that contains it ps chemical identity
2
Q
What is a physical change?
A
Does not produce a new substance. Changes in state ex. Freezing
3
Q
What is a chemical change?
A
Produces a new substance ex. Burning
4
Q
What state is it when a material has no definite shape but has a definite volume?
A
Gas
5
Q
What is a mixture?
A
A blend of any two or more kinds of matter as long as each maintains its own unique properties.
6
Q
All elements are organized into the____?
A
Periodic table/chart
7
Q
Metallics are often
A
Semiconductors
8
Q
How do you calculate Rf value?
A
Distance travelled by pigment/ distance traveled by solute= rf
9
Q
What is it called when some stuff settles at bottom of a mixture?
A
Suspension
