chemistry unit test

Question 1

Element definiton

Answer 1

A pure substance made up of only one type of atom, cannot be broken down into simpler substances

Question 2

Compound definition

Answer 2

A pure substance made up of two or more elements chemically combined in a fixed proportion

Question 3

Homogeneous definition

Answer 3

A sample of matter with only one phase

Question 4

Heterogeneous definition

Answer 4

A sample of matter with two or more phases

Question 5

Matter definition

Answer 5

Anything that has mass and volume

Question 6

Melting point

Answer 6

The temperature at which a solid turns into a liquid

Question 7

Freezing point

Answer 7

The temperature at which a liquid turns to a solid

Question 8

Melting point and freezing point?

Answer 8

The melting point and freezing point are always the same temperature

Question 9

Boiling point definition

Answer 9

The temperature at which a liquid turns to a gas

Question 10

Condensing point definiton

Answer 10

The temperature at which a gas changes to a liquid always the same temperature as the boiling point

Question 11

What is energy?

Answer 11

The ability to do work or make things work

Question 12

3 physical properties of water

Answer 12

Low viscosity
Liquid ( room temp)
Colourless

Question 13

electron definition

Answer 13

the negative subatomic particle found in the orbits outside of the nucleus

Question 14

molecule definition

Answer 14

two or more atoms chemically linked

Question 15

periodic table definition

Answer 15

the arrangement of elements according to structures and properties

Question 16

what are the horizontal rows of the periodic table called?

Answer 16

period

Question 17

what are the vertical column of the periodic table called

Answer 17

groups or families

Question 18

metal description

Answer 18

• malleable
• good conductors of heat / electricity
• silver and solid
• shiny
• ductile

Question 19

non metal description

Answer 19

• solid or gas
• dull
• brittle
• poor conductors

Question 20

where are metals located on the periodic table

Answer 20

left side of the staircase

Question 21

where are non metals located on the periodic table?

Answer 21

right side of the staircase

Question 22

what are metalloids? where are they located? give examples

Answer 22

metalloids have properties of both metals and nonmetals. they are located along the staircase. example: silicon,germanium,arsenic, boron