Download Signs of Reaction - Calderglen High School

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Calderglen High School
1.
What always happens in a
chemical reaction?
answer
A new substance is always
formed in a chemical reaction
Calderglen High School
2.
What changes might indicate that a
chemical reaction has taken place?
answer
Energy change
Permanent colour change
Gas produced (effervescence)
Solid formed in a liquid
Calderglen High School
3. An element is ………
answer
An element is the simplest type of
substance.
It is made up of only 1 type of atom.
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4.
What is a GROUP in the Periodic
Table?
answer
A column
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5.
What are the Group 1 elements
called?
answer
Alkali metals
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6.
What are the Group 7 elements
called?
answer
Halogens
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7.
What are the Group 0 (8) elements
called?
answer
Noble gases
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8.
What are compounds?
answer
Substances made of two or more
different types of atom joined
together.
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9.
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.
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10. What element is present in compounds
that have names ending in –ate and –ite?
answer
oxygen
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11. 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 obvious from the name.
Except: Hydroxide (something + H + 0) and
Cyanide (something + C + N)
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12.
A solute is ……….
answer
A solute is a substance (usually a solid)
which dissolves in a solvent to form
a solution.
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13. A solvent is …………
answer
A liquid in which a solute
dissolves.
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14. What is a SOLUTION?
answer
A solution is formed by dissolving a
solute (usually a solid) in a solvent
(usually a liquid)
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15. What is an AQUEOUS
SOLUTION?
answer
An aqueous solution is one
where the solvent used to
dissolve the solute is water
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16. 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
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17. What is the meaning of the words
CONCENTRATED and DILUTE?
answer
Concentrated solutions have a large amount
of solute in a relatively small volume of
solvent.
Dilute solutions have a relatively small
amount of solute
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18. What is a SATURATED
solution?
answer
A saturated solution is a solution
which cannot dissolve any more
solute.
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19. 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
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20. What are ATOMS?
answer
Atoms are very small, particles which
make up every element. They are too
small to see.
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21. What is a PRECIPITATE?
answer
A precipitate is a solid which is
formed when two solutions
react together
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22. What is EFFERVESCENCE?
answer
Effervescence is bubbling and fizzing
when a gas is given off .
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23. Give the SYMBOLS for the elements
- lead, gold, sodium, potassium and iron?
answer
Lead – Pb
Gold – Au
Sodium – Na
Potassium – K
Iron - Fe
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24. What is the difference between
COLOURLESS and CLEAR?
answer
Colourless means having no colour.
Clear means you can see through
something.
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25. SOLUBLE means ……..
answer
the substance
dissolves
in the solvent
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