Y9 topic 1

Question 1

What is a atom

Answer 1

Smallest part of a element

Question 2

What is a molecule

Answer 2

Two or more atoms chemically bonded together that form a substance

Question 3

Compound

Answer 3

A substance made from two or more substances chemically bonded together in a fixed ratio

Question 4

Element

Answer 4

Pure substance made from 1 type of atom

Question 5

Electron

Answer 5

Subatomic particle with a negative charge and a negligible (almost no mass) mass relative to protons and neutrons

Question 6

Proton

Answer 6

Subatomic particle with a positive charge and a relative mass of 1. relative charge of a proton is +1.

Question 7

Neutron

Answer 7

Uncharged subatomic particle with a mass of 1 relative to a proton. Relative charge of a neutron is 0

Question 8

What is a solution

Answer 8

A solution is made when a substance dissolves into a liquid. The liquid is called the solvent. The substance that has been dissolved is called the solute

Question 9

What is a solvent

Answer 9

The liquid in a solution which dissolves the solute. For example, the solvent in sea water is water

Question 10

What is a solute

Answer 10

The solid or occasionally a gas which dissolves into a solvent liquid in order to make a solution. For example the main solute in sea water is sodium chloride

Question 11

What is a product

Answer 11

A reaction finishes when one of the reactants is all used up. The other reactant has nothing left to react with, so some of it is left over

Question 12

What is a ballenced equation

Answer 12

A balanced symbol equation has the same number of atoms of each element on both sides of the arrow

Question 13

Miscible

Answer 13

Liquids that can not mix

Question 14

Imisible

Answer 14

Liquids that can mix

Question 15

Evaporation

Answer 15

When liquid gains energy and becomes a gas (can happen at any temperatures)

Question 16

Condensation

Answer 16

When a gas loses energy and becomes a liquid

Question 17

Distillation

Answer 17

A separation method that is the process of evaporation followed by condensation

Question 18

Distillate

Answer 18

The pure liquid obtained after distillation

Question 19

Boiling point

Answer 19

The temperature at which molocules are evaporating

Question 20

Fractional distillation

Answer 20

A separation method that is the process evaporation followed by condensation. The fractional . Column allows liquids of similar boiling point to be separated and then collected in sections called fractions.