Chemistry C1

Question 1

Aqueos solution

Answer 1

The mixture made by adding a soluble substance to water

Question 2

Atom

Answer 2

The smallest part of an element that can still be recognised as that element

Question 3

Atomic number

Answer 3

The number of protons (which equals the number of electrons) in an atom. It is sometimes called the proton number

Question 4

Balanced symbol equation

Answer 4

A symbol equation in which there are equal numbers of each type of atom on either side of the equation

Question 5

Biofuel

Answer 5

Fuel made from animal or plant products

Question 6

Chromatography

Answer 6

The process whereby small amounts of dissolved substances are separated by running a solvent along a material such as absorbent paper

Question 7

Compound

Answer 7

A substance made when 2 or more elements are chemically bonded together

Question 8

Electron

Answer 8

A tiny particle with a negative charge.

Question 9

Electronic structure

Answer 9

A set of numbers to show the arrangement of electrons in their shells.

Question 10

Element

Answer 10

A substance made up of only 1 type of atom.

Question 11

Group

Answer 11

All the elements in the columns in the periodic table.

Question 12

Ion

Answer 12

A charged particle produced by the loss or gain of electrons. Metals lose an electron to become positive, and non-metals gain an electron to become negative.

Question 13

Mass number

Answer 13

The number of protons plus neutrons in the nucleus of an atom.

Question 14

Noble gases

Answer 14

The very unreactive gases found in group 0.

Question 15

Product

Answer 15

A substance made as a result of a chemical reaction.