Chemistry

Question 1

What happens to melting point if a substance
is impure?

Answer 1

It happens over a range of temperatures

Question 2

What is made when a metal reacts with oxygen?

Answer 2

A metal oxide

Question 3

Can gases dissolve?

Answer 3

Yes

Question 4

What is another name for group 0?

Answer 4

Noble gases

Question 5

Name the elements in group 0?

Answer 5

He, Ne, Ar, Kr, Xe, Rn

Question 6

Name the products in the reaction of a metal and an acid

Answer 6

Salt and Hydrogen

Question 7

What group are the halogens in?

Answer 7

Group 7

Question 8

Name two metals that react vigorously
with oxygen from the air

Answer 8

Magnesium, Zinc

Question 9

What is a mixture?

Answer 9

It is made up of two or more substances mixed
together but not chemically bonded

Question 10

What happens when high voltages are passed through
noble gases?

Answer 10

It glows

Question 11

Where are metals on the periodic table?

Answer 11

On the left.

Question 12

what is the word equation for the reaction of Sodium & Chlorine

Answer 12

Sodium + Chlorine → Sodium chloride + hydrogen

Question 13

State what the atmosphere is

Answer 13

A mixture of gases that surround the Earth

Question 14

What compund is table salt?

Answer 14

Sodium chloride (NaCl)

Question 15

What is a Ferrous metal

Answer 15

A metal compund with Iron (Fe) in it

Question 16

Describe how you could test for
hydrogen gas

Answer 16

Lit splint. It pops.

Question 17

What is distillation?

Answer 17

Evaporation followed by condensation

Question 18

List three properties of a metal?

Answer 18

Good conductor of electricity, good conductor of heat, shiny, high density, malleable, ductile,
sonorous

Any three of these ^^^

Question 19

Where are metals on the periodic table?

Answer 19

On the left