Atoms, Elements, Compounds and Limestone

Question 1

What charge do electrons have?

Answer 1

Negative

Question 2

What charge do neutrons have?

Answer 2

Neutral

Question 3

The number of electrons equals the number of _______.

Answer 3

Protons

Question 4

The number of ____ on the outer shell shows the group that the element is in.

Answer 4

Electrons

Question 5

The most inner shell holds how many electrons max?

Answer 5

2

Question 6

Not counting the inner shell, how many electrons do the shells hold max?

Answer 6

8

Question 7

An atom is unreactive and stable if it has what?

Answer 7

Full outer shells.

Question 8

What does me+aL mean?

Answer 8

Metals become positive.

They are losers as they lose electrons.

Question 9

What are ions?

Answer 9

When an atom gains or loses an electron and has a + or a - next to it.

Question 10

Copper is a good conductor of electricity. What could It be used for?

Answer 10

Electrical wire.

Question 11

Aluminium can be made into thin sheets. What is it good for?

Answer 11

Cooking foil.

Question 12

Gold reflects light. What is it good for?

Answer 12

Jewellery

Question 13

Brass can be used to make a noise. What is it good for?

Answer 13

Musical instruments.

Question 14

Iron is cheap because there is a lot of it. What is it good for?

Answer 14

Gates

Question 15

Tungsten can be heated until it is white hot. What is it good for?

Answer 15

Light bulbs.

Question 16

Mercury expands when it is heated. What is it good for?

Answer 16

Thermometer

Question 17

Lead has a high density. What is it good for?

Answer 17

Plumb line.

Question 18

Chromium does not rust. What is it good for?

Answer 18

Car bumpers.

Question 19

Nickel is hard. What is it good for?

Answer 19

Coins.

Question 20

Limestone is also called ______.

Answer 20

Calcium Carbonate

Question 21

What is the equation for quick lime?

Answer 21

Calcium Oxide + Carbon Dioxide

Or

CaO + CO2

Question 22

What is slaked lime also known as? (Give its name and its formula)

Answer 22

Calcium Hydroxide

Ca(OH)3 (s)

Question 23

What is the formula for lime water?

Answer 23

Ca(OH)3 (aq)

Question 24

The process to turn limestone to quick lime is _______.

Answer 24

Thermal decomposition.

Question 25

The turn quick lime to slaked lime you add a few drops of what?

Answer 25

Water (H2O)

Question 26

To turn slaked Lime to lime water, you add ______.

Answer 26

More water

Question 27

Adding more water to slaked lime makes Lime water a ______.

Answer 27

Solution

Question 28

To turn lime water to limestone, you add _______.

Answer 28

Carbon Dioxide (CO2)

Question 29

Name some advantages of limestone quarries.

Answer 29

You can make things such as cement, mortar and glass. It makes jobs for the unemployed such as drivers, builders and those who work in the quarries. It is environmentally beneficial.

Question 30

Name some disadvantages of limestone quarries.

Answer 30

``` Used land/eyesore/land pollution It's noisy Smoke/ air pollution. It's a safety hazard There's a lot of dust involved. ```

Question 31

What charge to protons have?

Answer 31

Positive