Chemistry paper 1 (From atomic structure to energy changes)

What is an element?

• A substance you can separate

• Two or more substances joined together

• Made up of only one type of atom

• The smallest part of a substance

What is the Charge of an Electron?

• Positive Charge

• Negative Charge

• Neutral Charge

How many neutrons does an atom of Boron have?

• 11

• 5

• 6

• 16

Who created the plum pudding model?

• TT Johnson

• Curie

• JJ Thompson

• Dalton

Which scientist discovered atoms have a 'positive nucleus' with electrons around the outside - in a 'alpha particle scattering experiment'?

• Neils Bohr

• James Chadwick

• Ernest Rutherford

• JJ Thomson

Select the 3 things that describe Group 1 Elements as you go DOWN the group:

• More Reactive

• Lower Melting/Boiling Point

• Higher relative atomic mass

• Less Reactive

• Higher Melting/Boiling Point

Why can graphite be used as a lubricant?

• Graphite is slippery as the layers are held together with weak intermolecular forces that can slide off each other

• Graphite is slippery as the layers are held together with strong covalent bonds that can slide off each other

• Because graphite is a giant covalent compound

• Graphite cannot be used as a lubricant because it is not slippery

If an atom loses two electrons what charge will it have?

• + 2
•  - 2
• +1
• -1

What type of forces act between the ions in an ionic compound?

• Electrostatic

• Frictional

• Gravitational

• Magnetic

What are TWO properties of ionic compounds?

• Conducts electricity when molten

• High melting point

• Low melting point

• Small molecules

• Weak bonds between particles