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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 871:

When sodium atom form the ion Na⁺,

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A It gains one proton
B It achieves a noble gas configuration
C Its atomic number increases
D It gains one electron

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Question 872:

When sodium atom form the ion Na⁺,

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A It gains one proton
B It achieves a noble gas configuration
C Its atomic number increases
D It gains one electron

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Question 873:

Which of the following statements about rare gases are correct?

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A Their outermost shells are fully filled
B They are generally unreactive
C Their outermost shells are partially filled
D They have lone pair of

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Question 874:

Which of the following properties is characteristic of the halogens?

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A Ability to accept electrons readily
B Ability to donate electrons readily
C Ability to from basic oxides
D Formation of coloured compounds

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Question 875:

In which of the following atoms is the ionic radius larger than the atomic radius? [₁₁ Na, ₁₂Mg,₁₃AI,₁₇CI]

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A Aluminium
B Chlorine
C Magnesium
D Sodium

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