Chemistry

Question 1

Solid to liquid is…

Answer 1

Melting

Question 2

Liquid to solid is…

Answer 2

Freezing

Question 3

Liquid to gas is…

Answer 3

Boiling

Question 4

Gas to solid is…

Answer 4

Condensing

Question 5

Neutrons

Answer 5

Neutral (no charge) - 1 mass unit

Question 6

Protons

Answer 6

+1 charge - 1 mass unit

Question 7

Electron

Answer 7

-1 charge - no mass

Question 8

Element

Answer 8

Made up of any 1 type of atom

Question 9

Compound

Answer 9

More than 1 type of element, chemically combined together

Question 10

Mixture

Answer 10

More than 1 type of element, not chemically joined

Question 11

Molecule

Answer 11

A small groups of atoms, you can have a molecule of an element : O2 molecule of a compound - H2O

Question 12

Souluble

Answer 12

Something that can be dissolved

Question 13

Insoluble

Answer 13

Something that cannot dissolve

Question 14

Distillation

Answer 14

A technique used to separate a solvent and a solution

Question 15

Solute

Answer 15

A substance that dissolves in another substance

Question 16

Solvent

Answer 16

A substance that dissolves a solute

Question 17

Solution

Answer 17

Mixture of the solvent and the solute

Question 18

Pure

Answer 18

1 element or 1 compound

Question 19

Chromatography

Answer 19

Used to separate mixtures of substances into their components

Question 20

Solvent front

Answer 20

The furthest the solvent ( the liquid that separates the inks ) can reach

Question 21

What happens during chromatography?

Answer 21

The solvent soaks up the paper and travels to the ink dots and the ink spreads out, separating the components of the substance

Question 22

Rf value

Answer 22

Distance travelled by substance

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Question 23

35 - ???
Cl
17 - ???

Answer 23

35 - mass no. (Protons+neutrons)
Cl
17 - atomic no. ( electrons / protons )

Question 24

Isotopes

Answer 24

A variant of a particular chemical element which differ in neutron number

Question 25

35 37 Cl Cl 17 17

Answer 25

Both isotopes are chlorine because they both contain 17 protons / Electrons. However they are different isotopes because their mass numbers are different.

Question 26

Electrons

Answer 26

Shells around the nucleus. Max of 2 electrons on 1st shell and max of 8 electrons on other shells.