Compounds

Define a compound, write compound formulae and name compounds based on the atoms they contain.

Compounds

Define a compound, write compound formulae and name compounds based on the atoms they contain.

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Lesson details

Key learning points

  1. Define a compound and know they have their own unique properties
  2. Write names and formulae for compounds

Equipment

Periodic table

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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6 Questions

Q1.
Atoms are the _______ unit of matter.
largest
medium
Correct answer: smallest
Q2.
A one or two letter representation of an element is known as its chemical .
Correct Answer: symbol
Q3.
Two or more atoms bonded together is known as a .
Correct Answer: molecule
Q4.
Match the elements to their chemical symbols.
Correct Answer:oxygen,O

O

Correct Answer:hydrogen,H

H

Correct Answer:carbon,C

C

Correct Answer:fluorine,F

F

Q5.
Starting with lithium, put these elements in the correct order going down Group 1.
1 - lithium
2 - sodium
3 - potassium
4 - rubidium
5 - caesium
6 - francium
Q6.
The chemical formula for water is …
H2
Correct answer: H2O
CO2
O2

6 Questions

Q1.
Match each keyword to its definition.
Correct Answer:element,A substance containing one type of atom.

A substance containing one type of atom.

Correct Answer:molecule,Two or more atoms bonded together.

Two or more atoms bonded together.

Correct Answer:compound,Two or more different elements bonded together.

Two or more different elements bonded together.

Correct Answer:mixture,Two or more elements not bonded together.

Two or more elements not bonded together.

Q2.
A chemical compound contains elements in ________ proportions.
equal
Correct answer: fixed
unequal
variable
Q3.
The properties of compounds are _______ the properties of the elements they are made from.
Correct answer: different to
exactly the same as
similar to
Q4.
What is the correct formula for magnesium sulfate?
MGCO3
MGO
MGS
Correct answer: MGSO4
Q5.
Which two are rules used for writing chemical formulae?
A large 2 is used at the front of the compound if there is two of each atom.
Correct answer: Elements are placed in the order of left to right from the periodic table.
Subscript numbers are placed to the right of the corresponding element.
Correct answer: Subscript numbers are used when there is more than one atom.
You simplify the formulae to the simplest whole number ratio.
Q6.
Name the compound that contains one sulfur atom and two oxygen atoms.
Correct answer: sulfur dioxide
sulfur oxide
sulfur oxygen
sulfur trioxide

Lesson appears in

UnitScience / Atoms and the periodic table

Science