Review

Question 1

Qualitative Observation

Answer 1

Observations based on information you get through your 5 senses.

Example: The liquid was light blue in colour

Question 2

Quantitative Observation

Answer 2

Observations based on measurment or counting.

Example: At the end of the experiment there was 3g of precipitate.

Question 3

Physical Change

Answer 3

A change in the form or state of a substance without forming a new one.

Example: Ice melting to water (Solid to liquid).

Question 4

What are the 5 Signs of Chemical Change?

Answer 4

1) New colour
2) Heat or light is given off
3) Bubbles or Gas form
4) Precipitate (Solid) is formed
5) The change is diffucult to reverse

Question 5

Ion

Answer 5

Charged atom that gains or looses electrons.

Question 6

Polyatomic

Answer 6

More than one atom together.

Example: OH, SO₄

Question 7

Molecular

Answer 7

A compound made of two non-metals.

Example: CCl₄

Question 8

Ionic Compound

Answer 8

Compound made of a metal and a non-metal.

Example: NaCl

Question 9

Homogeneous Mixture

Answer 9

A mixture in which you can only see one phase throughout.

Example: Milk

Question 10

Heterogeneous Mixture

Answer 10

A mixture that you can see two or more phases throughout.

Example: Pizza with toppings

Question 11

Compound

Answer 11

More than one element bonded together.

Question 12

Atom

Answer 12

The smallest portion of an element.

Question 13

Molecule

Answer 13

More than one atom bonded together.

Question 14

Solution

Answer 14

A liquid mixture where the separate parts cannot be seen.

Question 15

Mechanical Mixture

Answer 15

A mixture where each individual part can be visibly seen.

Question 16

Where are metals and non-metals located on the periodic table?

Answer 16

Metals: The left of the staircase

Non-metals: The right of the staircase

Question 17

Matter

Answer 17

Anything that has a mass and takes up space.

Question 18

WHMIS

Answer 18

Workplace Hazardous Materials Information System

Question 19

Malleable

Answer 19

How easily a material is bent.

Question 20

Ductile

Answer 20

How easily a material is drawn into wires.

Question 21

Soluble

Answer 21

A substance that dissolves in water.

Question 22

Viscosity

Answer 22

How easily a substance flows.

Question 23

Cation

Answer 23

Looses electrons (+).

Question 24

Anion

Answer 24

Gains electrons (-).

Question 25

Do metals usually react to form cations?

Answer 25

Yes. they usually loose electrons.

Question 26

What colours does litmus paper turn when acidic and basic?

Answer 26

Acidic: Red Basic: Blue

Question 27

When a base dissolves in water what is produced?

Answer 27

Hydroxide Ions (OH).

Question 28

What are the names, charges, locations, and sizes of the 3 subatomic particles?

Answer 28

1) Proton. (+), Nucleus, Small 2) Neutron, (Neutral), Nucleus, Small 3) Electron, (-), Very, Orbits, Small

Question 29

When drawing a Bohr- Rutherford diagram of an element, what can the period and column that element is in tell us about what the diagram will look like?

Answer 29

Period= # of shells Column= # of electrons in valence

Question 30

What are the 4 steps to writing a chemical formula for an ionic compound?

Answer 30

*Example: Oxygen and Barium* Step 1) Write both element symbols with their charge *O^2- and Ba²⁺ * Step 2) Switch the charges and write them at the bottom of the element symbol without their signs *Ba₂ and O₂* Step 3) Reduce if possible 2/2 and 2/2 *=BaO* Step 4) Write the new compound name using an "ide" ending *Barium Oxide*

Question 31

What are the 2 steps to naming ionic compounds?

Answer 31

*Example: BaO* Step 1) Metal is always written first along with the non-metal to follow *Barium Oxygen* Step 2) Change the ending of the non-metal to "ide" *Barium Oxide*

Question 32

What are the 4 types of chemical equations and a basic formula example of each?

Answer 32

1) Synthesis ex: **A + B = AB** 2) Decomposition **ex: AB = A + B** 3) Single Displacement **ex: AB + C = AC + B** 4) Double Displacement **ex: AB + CD = AD + BC** 5) Combustion ex: Any reaction involving Carbon, Oxygen, and Hydrogen (Burns) **ex: C3H8 + 5O2 = 3CO2+ 4 H2O**

Question 33

Atomic Number

Answer 33

A number that determines the identity of an element and is equal to the number of protons in the nucleus

Question 34

Which subatomic particles are found in the nucleus?

Answer 34

Protons and Neutrons

Question 35

How to do you calculate the number of neutrons in an atom?

Answer 35

Atomic Mass- Atomic Number

Question 36

What is the most reactive metal and non-metal?

Answer 36

Metal: Cesium Non-Metal: Fluorine

Question 37

Ionic Compound vs Molecular Compound

Answer 37

**Ionic Compound**: A compound made up of a metal and a non metal **Molecular Compound**: A compound made up of a metal and a non-meal

Question 38

Polyatomic vs Diatomic

Answer 38

**Polyatomic:** 2 or more non-metals creating a compound with a charge (Back of periodic table) **Diatomic:** the 7 elements that make up HOBrFINCl