S1 - My Chemical World (Part 2)

The nucleus of an atom contains...

• Protons only

• Electrons only

• Protons and neutrons

• Electrons and neutrons

What is the chemical formula for a compound containing 1 carbon atom and 4 hydrogen atoms?

• CH₄

• C₁H₄

• Ch₄

• CH4

Which of the following elements is an alkali metal?

• Calcium

• Boron

• Nitrogen

• Potassium

Which substance has the lowest melting point?

• A

• B

• C

Which substance has the highest boiling point?

• A

• B

• C

What state is substance A at room temperature (20^oC) ?

• Solid

• Liquid

• Gas

What state is substance B at room temperature (20^oC) ?

• Solid

• Liquid

• Gas

What state is substance C at room temperature (20^oC) ?

• Solid

• Liquid

• Gas

A compound name ends in '-ate', how many elements could be in the compound?

• 1

• 2

• 3

A student added acid to another solution. The student felt the beaker get colder. What sign of a chemical reaction has occurred?

• Fizzing

• Change in temperature

• Colour change

• Liquid turns cloudy