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1. What are the building
blocks of matter?
answer
Elements.
2. Give some metallic properties?
answer
Conduct electricity and heat
Malleable (bend into shape)
Ductile (draw into wires)
Most of them are strong
3.
Where in the Periodic Table would you
find the METALS and the NON-METALS?
answer
Metals are found to the Left Hand Side
of the zigzag line; Non-metals to the
Right Hand Side of the zig-zag line
4.
What is meant by a property of
a chemical?
answer
A property of a chemical is
what it is like or what it can do
chemically
5.
Why are certain elements in the
same group?
answer
Because they have similar
chemical properties
6. What are ATOMS?
answer
Atoms are very small, particles which
make up every element. They are too
small to see.
7.
What is a PERIOD in the periodic
table?
answer
A row of elements
8.
What is a GROUP in the Periodic
Table?
answer
A column of elements
9.
Use the Periodic Table in your planner.
Give the SYMBOLS for the elements :
lead, gold, sodium, potassium and iron?
Lead – Pb
Gold – Au
Sodium – Na
Potassium – K
Iron - Fe
answer
10. What are compounds?
answer
Substances made of two or more
different types of atom joined
together.
11.
What is a molecule?
answer
Two or more non metal atoms
joined together
Can be element e.g. O2, H2
OR compound e.g. H2O, CO
12. What is the difference between a
compound and a mixture?
answer
The atoms of a compound are joined together.
The substances in a mixture are NOT joined
and can be easily separated.
13. What is ELECTROLYSIS?
answer
Using ELECTRICITY to break up a
compound.
14. What is always formed in a
chemical reaction?
answer
A new substance is always
formed a chemical reaction
15. Sort these into chemical answer
reaction and physical change.
Hair growing,
Chemical
Reaction
Ice melting,
Match burning,
Hair growing
Baking cake,
Firework exploding,Match burning
Boiling water
Baking cake
Firework exploding
Physical Change
Ice melting
Boiling Water
16. What changes might indicate that
a chemical reaction has taken place?
answer
Energy change
Permanent colour change
Gas produced (effervescence)
Solid formed from two solutions
(precipitation)
17. What is an EXOTHERMIC
reaction?
answer
A reaction which releases
energy.
18. What is EFFERVESCENCE?
answer
Effervescence is bubbling and fizzing
when a gas is given off .
19. What is a PRECIPITATE?
answer
A precipitate is a solid which is
formed when two solutions
react together
20. What does -ide at the end of the
name of a compound indicate?
answer
IDE means that the compound is made up of
the TWO elements
(the actual elements are obvious from the
compound’s name).
21. Write a word equation for:
Methane burns in oxygen to produce carbon
dioxide. Water is also produced.
answer
Methane + Oxygen  Carbon + Water
Dioxide
22. Write the basic chemical
formula for water.
answer
H2O
23. Write the basic chemical
formula for carbon dioxide.
answer
CO2
24. Name FOUR factors which affect the
speed (or rate) of a chemical reaction?
Particle Size (Surface Area)
Temperature
Concentration
Use of Catalyst
25. What is a catalyst?
A substance which can speed up a
reaction, but is not used up in the
reaction and can be recovered
chemically unchanged
26. What are ENZYMES?
Catalysts from living
things (Biological
catalysts)
27. When can a catalyst NOT
speed up a reaction?
SOME reactions DO NOT have a
catalyst.
28. Describe how the concentration of
reactants affects the speed of a reaction?
As reactant concentration
increases the speed of
reaction increases.
29. Describe how particle size
affects the speed of reaction?
As particle size decreases the
speed of reaction increases
30. Describe how temperature
affects the speed of reaction?
As temperature increases the
speed of reaction increases
31. Why does decreasing the particle
size of reactants increase the
speed of reaction?
Smaller particles give a bigger
surface area. This results in more
collisions between reactants and
therefore faster reactions
32. What is a VARIABLE?
Any factor in an experiment
which can be changed or varied.
e.g. concentration or temperature
of the solution used
33. Rates Experiments
• Which two of the following experiments
could be used to find the effect of changing
the particle size?
A
2M hydrochloric acid
at 250C
B
2g of small chalk lumps
answer
C
2M hydrochloric acid
at 250C
2g of large chalk lump
2M hydrochloric acid
at 150C
2g of small chalk lumps
D
1M hydrochloric acid
at 250C
2g of small chalk lumps
34. Rates Experiments
• Which two of the following experiments
could be used to find the effect of changing
the concentration of the acid?
A
2M hydrochloric acid
at 250C
B
2g of small chalk lumps
answer
C
2M hydrochloric acid
at 250C
2g of large chalk lump
2M hydrochloric acid
at 150C
2g of small chalk lumps
D
1M hydrochloric acid
at 250C
2g of small chalk lumps
35. Rates Experiments
• Which two of the following experiments
could be used to find the effect of changing
the temperature of the acid?
A
2M hydrochloric acid
at 250C
B
2g of small chalk lumps
C
answer
2M hydrochloric acid
at 250C
2g of large chalk lump
2M hydrochloric acid
at 150C
2g of small chalk lumps
D
1M hydrochloric acid
at 250C
2g of small chalk lumps
36. What is the test for hydrogen?
answer
Burns with a pop.
37. What is the test for oxygen?
answer
Relights a glowing splint.
38. What is the test for carbon
dioxide?
answer
Turns lime water cloudy.