Chemistry - Periodic Table_Group VII

How many valence electrons do Group VII elements have?

• 1

• 3

• 5

• 7

Group VII elements are/have... (Check all that apply.)

• Coloured

• Low melting and boiling points

• High melting and boiling points

• Diatomic covalent molecules

Rearrange the halogen samples into the corresponding positions down the Group, according to their states at room temperature.

• 3, 4, 2, 1

• 3, 2, 1, 4

• 2, 3, 1, 4

• 1, 2, 4, 3

Down the Group, melting and boiling points _____ and the reactivity of each element _____.

• decrease, increases

• increase, decreases

• stay the same, increases

• increase, stays the same

Halogens are very reactive, because...

(Hint: the options must match!)

• They have 1 extra electron

• They have 7 valence electrons

• They only need 1 more electron to achieve stable noble gas configuration

• They only need to lose 1 electron to achieve stable noble gas configuration

What are two chemical properties of halogens?

• Displacement reactions

• Removal reactions

• Reaction with metals

• Reaction with non-metals

When a metal reacts with a halogen, the salt formed is called a...

• Metal halogen

• Metallic salt

• Metal halide

Halide ions have a charge of...

• +1

• 0

• -1

• -2

In this displacement reaction, which halogen is displaced and released?

Cl₂ + KBr → K__ + __

• K₂

• Br₂

• Cl₂

• None of the above

[Bonus question!] Group I metals react vigorously with water to form...? Check all that apply.

• Metal hydroxide

• Water

• Hydrogen

• Metal salt