Exam 1

Question 1

Define Chemistry

Answer 1

Study of matter and the changes it undergoes

Question 2

Matter

Answer 2

Physical material of universe (mass,volume,takes up space)

Question 3

Compound

Answer 3

Substance made of two or more atoms

Question 4

Molecule

Answer 4

Composed of two or more atoms

Question 5

Molecule

Answer 5

Composed of two or more atoms

Question 6

Every compound is a

Answer 6

Molecule

Question 7

Not all elements are

Answer 7

Molecules

Question 8

Kinds of atoms

Answer 8

Compositions

Question 9

Arrangements

Answer 9

Structure

Question 10

Homogeneous

Answer 10

All the same with no visible differences

Question 11

Heterogeneous

Answer 11

Can observe differences

Question 12

Pure substances

Answer 12

Matter that cannot be separated into other kinds of matter by physical means

Question 13

Physical change

Answer 13

Doesn’t change the identity of compound when measured or observed

Question 14

Chemical change

Answer 14

Change in type of matter

Question 15

Giga

Answer 15

G 10⁹

Question 16

Giga

Answer 16

G 10⁹

Question 17

Mega

Answer 17

M 10⁶

Question 18

Mega

Answer 18

M 10⁶

Question 19

Kilo

Answer 19

k 10³

Question 20

Deci

Answer 20

d 10^-1

Question 21

Centi

Answer 21

c 10^-2

Question 22

Milli

Answer 22

m 10^-3

Question 23

Micro

Answer 23

ų 10^-6

Question 24

Nano

Answer 24

n 10^-9

Question 25

Pico

Answer 25

p 10^-12

Question 26

Precision

Answer 26

Describes the reproducibility of the results (how often the same answer)

Question 27

Accuracy

Answer 27

Indication between accepted /true and measured values