Group 2 OCR revision

Group 2 OCR revision

Multiple Choice

The reactivity increases down the group from Mg to Ba. Why?

• As you move down the group, the radius increases and it is easier for the atom to lose it's outermost electron.

• As you move down the group, the radius decreases and it is easier for the atom to lose it's outermost electron.

• As you move down the group, the radius increases and it is harder for the atom to lose it's outermost electron.

• As you move down the group, the radius decreases and it is harder for the atom to lose it's outermost electron.

Multiple Choice

Write the balanced and then ionic equation for the reactions of:

Magnesium metal with dilute hydrochloric acid

• Mg + 2HCl -> MgCl₂ + H₂

  
  

  Mg(s) + 2H⁺(aq) -> Mg²⁺(aq) + H₂(g)

• Mg + HCl -> MgCl₂ + H₂

  
  

  Mg(s) + H⁺(aq) -> Mg²⁺(aq) + H₂(g)

• Mg + HCl -> MgCl₂ + H₂O

  
  

  Mg(s) + H⁺(aq) -> Mg²⁺(aq) + H₂(g)

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