Chemistry Revision

What is the symbol for Bromine

• Rb
• B
• Br2
• Br

What element has the symbol Li?

• Lead
• Iron
• Lithium-6
• Lithium

What is the symbol for Calcium?

• Ca
• Cl
• Ca2
• C

What is the electron arrangment for Chlorine (atomic number 17)?

• 2, 7, 8
• 2, 8, 7
• 2, 8, 6
• 1, 8, 7

What ion does the element Chlorine form?

• Chlorine ion (Cl)
• Chlorate ion (ClO3-)
• Chlorine dioxide ion (ClO2-)
• Chloride ion (Cl-)

How many electrons does the chlorine atom have (mass number 35 and it has 18 neutrons)?

• 20
• 18
• 16
• 17

What ion does the element Aluminium form (atomic number 13)?

• Aluminium ion (Al^4+)
• Aluminium ion (Al^1+)
• Aluminium ion (Al^2+)
• Aluminium ion (Al^3+)

Which element is this?

• Chlorine (atomic number 17)

• Sodium (atomic number 11

• Argon (atomic number 18)

• Neon (atomic number 10)

Lithium forms a positive ion because it has an electron configuration of Li: 2,1 so it will (gain/lose) an electron to obtain a full outer electron shell.

Oxygen is in group 16 of the periodic table and forms a negative ion. The oxygen atom has the electron configuration of O: 2,6. What is the charge on the ion for oxygen?

• -2
• +2
• 0
• +1