Revision Crossword Puzzle for GCSE Students

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	13																	14	15
						16
	17	18											19			20
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23						24								25				26
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							29								30		31
											32
33				34			35			36
				37								38				39	40
41			42						43							44
			45			46							47
48		49						50		51

		52									53

					54

Across:
1.	Feline pet.
5.	See 26 down.
8.	Atoms having the same number of protons and electrons but which differ in the number of neutrons in the nucleus of the atom.
12.	Word describing the energy required to start a chemical reaction.
13.	see 22 down.
14.	Long space in word processing.
16.	General name for a substance which dissolves.
17.	Property common to neutrons and protons, but lacking in electrons.
19.	Pure substance containing only one type of atom.
24.	Air is a common example. A substance containing several different molecules which are not combined.
25.	Representation of an atom in the periodic table.
27.	First member of a series of unsaturated hydrocarbons.
29.	This happens to jeans placed in HOCl.
31.	Number of outer electrons in sulphur.
32.	Pure substance containing two or more atoms combined in a fixed ratio by mass.
33.	Biological catalyst made of protein.
35.	Ionic substance produced in a neutralisation reaction.
37.	Conjunction indicating an alternative.
38.	Compounds with the same molecular formula but which have a different structure.
41.	Sum = .
43.	Reactive metal used to galvanise iron, protecting it from rusting.
44.	Puzzle.
45.	Number of electrons in the outer shell of a halogen atom.
48.	Fraction of crude oil with the highest boiling point used in making roads.
51.	Representation of a pure substance often used in chemical equations.
52.	General term used to describe a substance which forms when very many identical molecules link together in a repeating pattern.
53.	Category of thermal decomposition reaction describing the conversion of long chain hydrocarbons into smaller molecules.
54.	Process of purification involving evaporation followed by condensation.

Down:
1.	Theory which helps explain how increasing the concentration of a solution or increasing temperature increases rate of a reaction.
2.	Location.
3.	Position of the Periodic Table which has the most reactive halogen.
4.	Stuff from which everything is made.
6.	Non-metals _ _ _ _ one or more electrons when they change into ions.
7.	Mass number of the most common isotope of beryllium
9.	Description of a solution into which no more solute will dissolve (without altering the temperature).
10.	Substance which increases the rate of a chemical reaction by reducing the activation energy.
11.	The smallest possible particle of an element.
15.	Category of element which loses one or more electrons when changing form atom to ion.
18.	Type of particle released during some nuclear reactions. Type of male who wants to be boss.
20.	A message of reminder.
21.	Process in which a gas moves to fill all the space available to it. (Not to be confused with the activities of the Bomb Squad.)
22.	and 13 down. Chemists find inspiration in their "edible apricot" (anagram).
23.	Example of anaerobic respiration used in the brewing and baking industries.
26.	and 5 across. Category of chemical. Common examples include chlorine and potassium manganate(VII).
28.	Category of organic compound produced by reacting an alcohol with a carboxylic acid.
30.	eg Mary had a little lamb - Teacher tied it to a pylon - 10 000 volts went up its *** - And its wool turned into nylon.
31.	Symbol for tin.
34.	Butane is an example of a substance made of this category of particle.
36.	Procrastination is the _ _ _ _ _ of time. (So get on with your exam revision early.)
39.	Device used by chemists to show how particles rearrange during a chemical reaction.
40.	Symbol for ruthenium.
42.	Like the symbol for arsenic.
46.	The test for which you prepare all year.
47.	Collision.
49.	Like charges _ _ _ _ _ .
50.	Description of the winner in a race.

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						16
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							21					22
23						24								25				26
27					28
							29								30		31
											32
33				34			35			36
				37								38				39	40
41			42						43							44
			45			46							47
48		49						50		51

		52									53

					54

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		8							9					10
	11								12
	13																	14	15
						16
	17	18											19			20
							21					22
23						24								25				26
27					28
							29								30		31
											32
33				34			35			36
				37								38				39	40
41			42						43							44
			45			46							47
48		49						50		51

		52									53

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Revision Crossword Puzzle for GCSE Students

Across:

Down:

				1	2	3					4				5	6		7
		8							9					10
	11								12
	13																	14	15
						16
	17	18											19			20
							21					22
23						24								25				26
27					28
							29								30		31
											32
33				34			35			36
				37								38				39	40
41			42						43							44
			45			46							47
48		49						50		51

		52									53

					54