Physical Science Chemistry Revision

What charge do electrons have?

• Positive

• Neutral

• Negative

How many electrons can the third shell have?

• Two

• Eight

• Five

• Three

Which two particles are contained in the nucleus of an atom?

• Protons and Neutrons

• Protons and Electrons

• Electrons and Neutrons

How many electron shells/levels does this atom have?

• 1
• 2
• 3
• 4

How many neutrons does a sodium atom have? (Use the image to help you)

• 23
• 11
• 12
• 34

How many Electrons are in one atom of Lithium?

• 3
• 6
• 7
• 6.941

The electronic configuration of Ca is?

• 2,8,8,2

• 2,8,8,8,8,6

• 2,8,8

Mg²⁺ and Cl^- create...

• Mg₂Cl
• MgCl₂
• Mg₂Cl₂
• MgCl

Na⁺ and Cl^- create...

• Na₂Cl

• NaCl₂

• Na₂Cl₂

• NaCl

Potassium and Sulfur create...

• KS

• KS₂

• K₂S

• K₂S₂