Chemistry Flashcards

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1
Q

Define a compound
Give an example

A

One type of molecule which contains more than one kind of atom

Calcium carbonate
Carbon dioxide
Potassium maganate

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2
Q

Define a mixture
Give an example

A

Contain more than one kind of molecule

Air

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3
Q

Explain the difference between atoms, molecules and elements

A

Atoms - the smallest particles; ie the building blocks of all substances
Molecules - atoms chemically bound together
Elements - contain only one sort of atom

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4
Q

What is the equation for atomic mass?

A

The mass of one atom of the element ÷ the mass of one atom of hydrogen

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5
Q

How do you work out the mass of a molecule?

A

Add the atomic masses of the atoms present together.
For example carbon dioxide is made of 1 atom of carbon and 2 atoms of oxygen
Therefore 12 + (2 x 16)
= 44

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