C2.6 In Your Element Flashcards Preview

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Flashcards in C2.6 In Your Element Deck (46)
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1

chemical symbol

An abbreviation for an element which onsists of one, two or sometimes three letters.

2

electron

A negatively charged particle that surrounds the nucleus in an atom.

3

ductile

Can be stretched into wires.

4

giant ionic structure

A repeated regular arrangement of oppositely charged ions.

5

properties

The characteristics of a substance. Chemical properties describe how the substance reacts with other substances. Physical properties include information such as colour, melting point and state.

6

state symbols

Symbols used in chemical equations to show whether a substance is solid (s), liquid (l), gas (g) or dissolved in water, aqueous (aq).

7

proton

A positively charged particle found in the nucleus of all atoms.

8

halogen

A family of reactive non-metals found in Group 7 of the Periodic Table.

9

cathode

A negative electrode.

10

bond

An attractive force that holds atoms together in molecules and ions together in crystals.

11

neutron

Electrically neutral particle found in the nucleus of most atoms.

12

group

A column of the Periodic Table.

13

half equation

Equation to show the reaction at an electrode.

14

isotopes

Atoms of an element with the same number of protons and electrons but different numbers of neutrons.

15

ionic compound

A substance made of oppositely charged ions.

16

electrode

A rod of conductive material used in electrolysis, for example, graphite or platinum.

17

particle

A tiny piece of matter, such as an atom or molecule.

18

atom

A particle that is the smallest part of an element that can exist. An atom consists of protons and neutrons in a nucleus surrounded by electrons.

19

ion

An atom or group of atoms with an electrical charge. Ions can either be positively or negatively charged due to losing or gaining electrons.

20

alkali metal

An element found in Group 1.

21

chemical reaction

A chemical change in which new substances are formed but there is no change in the number of atoms of each element.

22

electron configuration

The arrangement of electrons in shells around the nucleus.

23

raw material

A starting substance for the manufacture of a particular chemical.

24

binary salt

A compound of a metal and a non-metal.

25

period

A row of the Periodic Table.

26

relative atomic mass

The mass of an atom compared to the mass of a carbon atom, which has a relative atomic mass of 12.

27

element

A substance made of only one type of atom. An element cannot be turned into another element or anything simpler using a chemical reaction.

28

conductivity

A property of a substance that describes its ability to allow energy (electricity or heat) to pass through it.

29

alkaline

A substance that turns universal indicator paper blue and has a pH greater than 7.

30

malleable

Can be bent or hammered into shape without breaking.

31

mass number

The total number of protons and neutrons in the nucleus of an atom. Also called nucleon number.

32

reactive

Likely to react with other substances.

33

shell

Space around a nucleus that can be occupied by electrons, usually drawn as a circle.

34

electron shell diagram

A picture that shows the arrangement of electrons in shells around the nucleus.

35

atomic number

The number of protons (positively charged particles) in the nucleus of an atom.

36

decompose

To break down a compound into simpler substances.

37

lattice

The arrangement of ions in a regular pattern giving crystals their regular shape.

38

nucleus

The positively charged centre of an atom.

39

ionic bond

Force between oppositely charged ions.

40

alloy

A mixture of metals or metals and non-metals.

41

anode

A positive electrode.

42

electrolysis

The breakdown of an ionic compound into simpler substances using electricity.

43

compound ion

An electrically charged group of two or more different atoms. For example, the sulphate ion SO consists of one sulphur atom and four oxygen atoms, with two negative charges overall.

44

solution

The mixture formed when a substance dissolves in water.

45

Periodic Table

A chart in which all the elements are put in order of increasing atomic number, with elements that have similar chemical properties arranged in groups.

46

noble gas

An element found in Group 0.