Chapter 4 😀- Chem

Question 1

Matter definition

Answer 1

anything that has mass and takes up space.

Question 2

Physical Property definition

Answer 2

Properties that describe compostion of an object

Question 3

4 Physical Property Examples

Answer 3

1. colour
2. shape
3. Ductility
4. Mallability

Question 4

Chemical Property Definition

Answer 4

The ability of a substance ot change into another

Question 5

3 chemical property examples

Answer 5

1. combustability
2. Flash point (lowest temp that a flammable liquid will ignite in air)
3. reaction to water ( Corrode or dissolving)

Question 6

pure substance definition

Answer 6

Made of 1 type of matter ie. and element (O) or compound (Co2)

Question 7

Mixture

Answer 7

Made of 2 or more pure substances can either be Homogenous or Heterogeneous

Question 8

Homogenues mixture definition

Answer 8

A mixture that looks the same through out.

Question 9

Heterogeneus mixture definition

Answer 9

A mixture where diffrent parts can be see throughout.

Question 10

Ionic Compound definition

Answer 10

Made of 1 or more (+) ion and 1 or more (-) ion with one metal and 1 non-metal.

Question 11

Molecular compound definition

Answer 11

Made of 2 or more non-metals

Question 12

What is the 3 points of the atomic theory ?

Answer 12

1. All matter is made of atoms
2. an atom is the smallest part of an element with all its properties.
3. Atoms of diffrent elements have diffrent properties

Question 13

Properties of P, N and E
Mass, Charge and location

Answer 13

1. P 1836, +1, Nucleus
2. N 1837, 0, Nucleus
3. E 1 , -1, In Shells

Question 14

Properties of Alkali Metals

Answer 14

Silver grey metals that react easily with water and oxegen

Question 15

Properties of Alkaline earth metals

Answer 15

Silver metals that are harder and less reaactive than Alklai metals

Question 16

Properties of halogens

Answer 16

Coulored gases that are very reactive

Question 17

Properties of noble gases

Answer 17

Coulourless non-reactive gases.