Laws, Daltons theory, and subatomic particles

Question 1

law of conservation of mass

Answer 1

mass is neither created nor destroyed during ordinary chemical reactions or physical changes

Question 2

law of definite proportions

Answer 2

a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound

Question 3

law of multiple proportions

Answer 3

if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers

Question 4

Daltons first point

Answer 4

all matter is composed of extremely small particles called atoms

Question 5

Daltons second point

Answer 5

atoms of a given element are identical in size, mass, and other properties, ; atoms of different elements differ in size, mass and other properties

Question 6

Daltons third point

Answer 6

atoms cannot be subdivided, created, or destroyed

Question 7

Daltons fourth point

Answer 7

atoms of different elements combine in simple whole-number ratios to form chemical compounds

Question 8

Daltons fifth point

Answer 8

in chemical reactions, atoms are combined, separated, or rearranged

Question 9

Electron

Answer 9

charge -1
mass # 0
actual mass 9.11+10*-31

Question 10

Proton

Answer 10

charge +1
mass # 1
actual mass 1.67+10*-27

Question 11

Nuetron

Answer 11

charge 0
mass # 1
actual mass 1.67+10*-27