Year 10 Chemistry pre-assessment

A proton is...

• Positively charged

• Neutral

• Negatively charged

• Not a thing

An element is determined by...

• How many protons it has

• How many neutrons it has

• How many electrons it has

The mass number of an element describes...

• The number of protons it has

• The number of electrons it has

• The number of neutrons it has

• The number of protons AND neutrons it has

If an element has 26 protons, and a mass number of 50, how many neutrons must it have?

• 22

• 24

• 26

• 34

An Isotope is when...

• An element has extra or less protons in it

• An element has extra or less neutrons in it

• An element has extra or less electrons in it

An ion is when...

• An atom has extra or less protons in it

• An atom has extra or less neutrons in it

• An atom has extra or less electrons in it

Metal are characterised by...

• Being able to gain electrons to form anions

• Being able to lose electrons to form cations

If oxygen, a group 6 element, forms an ion, it will be...

• 2+

• neutral, it will not form an ion

• 2-

• 1-

If sodium, a group 1 element, forms an ion, it will be...

• 1+

• Nup, can't

• 1-

• 2+

An atom loses three electrons, therefore it's charge will be...

• 3+

• 3-

• It depends on what the element it is