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Building Blocks 1a Int 2
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What is a group in the
Periodic Table?
A column of elements
What is a period in the Periodic Table?
A row of elements
Why are elements placed in the same group ?
They have similar chemical properties.
They have the same number of outer electrons.
Give the family name for the elements found in group 1.
Alkali metals
In which group do the halogens belong to?
Group 7
Give the family name for the elements found in group 0.
Noble gases
What name is given to the elements found between group 2 and group 3 in
the Periodic Table?
Transition metals
What does the name ending in -ide indicate about a
compound?
Two elements joined together
What does the name ending in -ate or ite indicate about a
compound?
3 elements joined together - one of which
is oxygen
Name the elements present in sodium silicate.
Sodium, silicon and oxygen
Name the elements present in sodium chloride.
Sodium and chlorine
Name the elements present in calcium hydroxide.
Calcium, hydrogen and oxygen.
What is the difference between a mixture and a compound?
Mixture - different atoms not
chemically joined.
Compound - different atoms joined together
What is an element?
A substance made up of one type of atom.
What is always formed in a chemical reaction?
New substance
Name the type of chemical reaction which releases heat.
Exothermic
In an endothermic reaction do the reactants or products have more
energy?
Products - energy taken in
reactants
products
In an exothermic reaction do the products have more or less energy than the reactants?
Less - energy is released
reactants
products
What changes indicate a chemical reaction has taken
place?
Colour change, energy change, gas given off, effervescence, precipitation
What is a precipitation reaction?
Two solutions(aq) react together to form a solid (s)
Ba(NO3)2(aq) + Na2 SO4(aq) BaSO4(s) + NaNO3(aq)
the precipitate
Is air a mixture of gases or a compound?
A mixture of gases
What is the percentage of nitrogen and oxygen in air?
Nitrogen ~ 80%
Oxygen ~ 20%
What is the test for oxygen gas?
Relights a glowing splint
Why is the test for oxygen in air not positive?
There is not enough oxygen in the air
What is meant by the following terms?solute, solvent, solution and saturated
Solute - a substance which dissolves in a liquid (soluble)
Solvent - a liquid in which a solid dissolves
Solution - a mixture formed when a solute dissolves in a solvent
Saturated - a solution in which no more substance can dissolve.
Which has a lower concentration of dissolved substance, a dilute or
concentrated solution?
A dilute solution.
Building Blocks 1a Int 2
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15
22 23 24 25 26
16 17 18 19 20 21