Chem Test 1

Question 1

The 3 parts of a Nucleus Atoms

Answer 1

Protons, Neutrons & Electrons

Question 2

What Model did Democritus discover?

Answer 2

The Atom

Question 3

What did Democritus discover?

Answer 3

Matter could not be divided into smaller and smaller pieces forever
Eventually the smallest possible piece would be obtained, which would be the atom

Question 4

What model did Dalton discover?

Answer 4

Billiard Ball Model

Question 5

What was Dalton’s Theory

Answer 5

All substance (elements) are composed of atoms that cannot be created divided or destroyed

Question 6

What model did J.J Thompson discover?

Answer 6

Plum Pudding Model

Question 7

What did J.J Thompson discover?

Answer 7

Negative charges came from within the atom, meaning a smaller particle existed and that atom were divisible.

Question 8

What was Ernest Rutherford’s Model?

Answer 8

The nuclear model

Question 9

What did Rutherford discover?

Answer 9

The gold atoms were mostly open space; not a pudding filled with a positively charged material?

Question 10

What model did Chadwick discover?

Answer 10

The planetary model

Question 11

What did Chadwick discover?

Answer 11

Negatively charged electrons circle rapidly through the empty space around the nucleus

Question 12

What model did Bohr discover?

Answer 12

Quantum Model

Question 13

What did Bohr discover?

Answer 13

Electrons move in definite orbits around the nucleus, much like planets circle the sun.

Question 14

What is matter?

Answer 14

Anything that takes up space.

Question 15

What is a physical Property?

Answer 15

a characteristic of a substance that can be observed without changing the substance into another substance.

Question 16

What is a chemical Property?

Answer 16

Describes how a substance acts…
What substances it reacts with
How it behaves chemically

Question 17

Skull and Crossbones

Answer 17

fatal/toxic if swallowed, inhaled, and in contact with skin

Question 18

Gas cylinder

Answer 18

pressurized gas and may explode if heated

Question 19

flame

Answer 19

flammable gases, aerosols, liquids, vapors and solids that may catch fire easily.

Question 20

Exploding Bomb

Answer 20

Chemicals that can blow up

Question 21

Flame over circle

Answer 21

may not burn itself but releases oxygen which may cause combustion or other materials

Question 23

health hazards

Answer 23

can cause cancer, allergies, asthma symptoms or breasting difficulties. Can affect the ability to have children or cause birth defects.

Question 24

Corrosion

Answer 24

Can cause severe skin burns, eye damage metals and other materials.

Question 25

Dangerous for the environment

Answer 25

Chemicals that can have short term or long lasting effects on environments that contain water such as the sea, rivers and streams

Question 26

Exclamation Mark

Answer 26

Less serious can cause irritation

Question 27

Biohazardous Infectious Materials

Answer 27

Organisms or toxins that can cause diseases in people or animals

Question 28

WHMIS

Answer 28

Workplace Hazardous Materials information System

Question 29

HHPS

Answer 29

Hazardous Household Product Symbols

Question 30

Physical Changes

Answer 30

Does not alter the chemical composition or identity of the substance and makes new substances

Question 31

Chemical changes

Answer 31

does alter the chemical composition or identity of a substance and makes new substances.

Question 32

Protons

Answer 32

+1 inside nucleus (determines the identity of the atom)

Question 33

neutrons

Answer 33

0 inside nucleus (holds together the nucleus)

Question 34

Electrons

Answer 34

-1 outside nucleus (responsible for reactivity)