Ch2. Review

Question 1

Antoine Lavoisier

Answer 1

Law of Conservation of Mass

Question 2

Joseph Proust

Answer 2

Law of Constant Composition

Question 3

What is the other name for The Law of Constant Composition?

Answer 3

Law of Definite Proportions

Question 4

All samples of a compound have the same composition; all samples have the same proportions, by mass, of the elements present in the compound

Answer 4

Law of Constant composition

Question 5

all matter is composed of extremely small, indivisible particles called atoms

Answer 5

Daltons Atomic Theory

Question 6

No atoms are created, destroyed or broken apart in a chemical reaction

Answer 6

Daltons Atomic Theory

Question 7

put the oxygen to carbon mass ratio in simplest form

8:4

Answer 7

2:1

Question 8

what is a neutrons relative charge

Answer 8

it has none; it is always electrically neutral

Question 9

what are protons and what MUST their mass be above?

Answer 9

positively charged particles and anything greater or equal to 1

Question 10

What is the similarity and difference between P and E

Answer 10

they have the same quantity,electrons are negatively charged

Question 11

isotopes

Answer 11

have the same number of protons and electrons but the number of neutrons are different

Question 12

atomic mass unit

Answer 12

u

Question 13

percent= fraction X 100%

Answer 13

atomic mass units

Question 14

who organized elements on the periodic table

Answer 14

Mendeleev

Question 15

which columns when written as a formula contain Roman Numerals?

Answer 15

3-13

Question 16

Law of Conservation

Answer 16

total mass remains constant during chemical reactions