C1-Atomic Structure and the Periodic Table KW

Question 1

Alkali metals

Answer 1

The elements in Group 1 of the periodic table

Question 2

Atom

Answer 2

The smallest part of an element that can exist. All substances are made up of atoms

Question 3

Atomic nucleus

Answer 3

Positively charged object composed of protons and neutrons at the centre of every atom with one or more electrons orbiting it.

Question 4

Chromatography

Answer 4

A separation technique used to separate a mixture of chemicals by distributing the components between two phases.

Question 5

Atomic number

Answer 5

The number of protons in the nucleus

Question 6

Compound

Answer 6

A substance made up of two or more types of atoms chemically combined together

Question 7

Crystallisation

Answer 7

A separation technique used to produce solid crystals from a solution by evaporating the solvent.

Question 8

Displacement

Answer 8

A chemical reaction in which a more reactive element displaces a less reactive element from its compound

Question 9

Electron

Answer 9

Negatively charged subatomic particle which orbit the nucleus at various energy levels. Very small relative mass (negligible)

Question 10

Electron shell

Answer 10

Different energy levels in atoms occupied by electrons

Question 11

Element

Answer 11

A substance made up of only one type of atom

Question 12

Fractional distillation

Answer 12

A method of separating a mixture of substances according to their different boiling points

Question 12

Filtration

Answer 12

A separation technique used to separate solids from liquids

Question 13

Halogens

Answer 13

The elements in Group 7 of the periodic table

Question 14

Group (periodic table)

Answer 14

The columns of the periodic table represent different groups of elements. Elements with similar properties are in the same group

Question 15

Ion

Answer 15

An atom or molecule with an electric charge due to the loss or gain of electrons

Question 16

Isotope

Answer 16

Atoms of the same element with the same number of protons but a different number of neutrons

Question 17

Mass number

Answer 17

The total number of protons and neutrons in the nucleus

Question 18

Metals

Answer 18

Elements that react to form positive ions. Found to the bottom left of the periodic table

Question 19

Mixture

Answer 19

A mixture consists of two or more elements or compounds not chemically combined together

Question 20

Neutron

Answer 20

Neutral subatomic particle present in the nucleus of the atom. Relative mass of 1

Question 21

Noble gases

Answer 21

The elements in Group 0 of the periodic table

Question 22

Non-metals

Answer 22

Elements that react to form negative ions. Found towards the top right of the periodic table

Question 23

Nuclear model

Answer 23

The nuclear atomic model stated that the mass was concentrated at the centre of the atom and that the nucleus was charged

Question 24

Periodic table

Answer 24

Table of elements arranged in order of atomic number and such that elements with similar properties are in the same column (group)

Question 25

Plum pudding model

Answer 25

Atomic model devised after the discovery of the electron. The model suggests the atom is a ball of positive charge with negative electrons scattered through it

Question 26

Proton

Answer 26

Positively charged subatomic particle present in the nucleus of the atom. Relative mass of 1

Question 27

Relative atomic mass

Answer 27

An average value that takes account of the abundance of the isotopes of the element

Question 28

Simple distillation

Answer 28

A procedure by which two liquids with different boiling points can be separated

Question 29

Transition metals

Answer 29

The collection of metallic elements in the middle of the periodic table.