Ch 1

Question 1

Pure substance not seperateable

Answer 1

Element

Question 2

Pure substance separable

Answer 2

Compound

Question 3

Not pure substance uniform in mixture

Answer 3

Homogenous

Question 4

Opposite of pure substance

Answer 4

Mixture

Question 5

Opposite of mixture

Answer 5

Pure substance

Question 6

Mixture not inform

Answer 6

Hetergenerors

Question 7

Compound

Answer 7

Compound is a structure composed of more than one element

Question 8

Law of conservation

Answer 8

Matter nether created or destroyed

Question 9

Law of definite proportions

Answer 9

All sembles of compound have same proportions of the constituent elements

Question 10

Law of multiple proportions

Answer 10

Divide smallest to get whole number ratio

Question 11

Daltons atoms theory

Answer 11

Elements consist of small in divisible particles
All atoms of same element are identical
Atoms can’t be created or destroyed
Compound elements are formed when atoms of different elements join in simple ratios to form compound atoms

Question 12

What did Thompson invent

Answer 12

Cathode ray to discover electron

Question 13

Rob milikan discovered

Answer 13

Oil drop experiment calculate charge of an electron

Question 14

Rutherford

Answer 14

Described the localization of charge and mass in the atom

Question 15

Isotope

Answer 15

Atom with same # of protons different # of neutrons

Question 16

Ions

Answer 16

Atoms becoming charged in away

Question 17

Cation

Answer 17

When atom loses electrons

Question 18

Anions

Answer 18

Gain electrons

Question 19

How many particles in a mole

Answer 19

6.022 x 10^23

Question 20

Amu

Answer 20

Atomic mass unit

Question 21

What decides what an element is

Answer 21

Of protons