Concept explainers
(a)
Interpretation:
To state whether the given statement is true or false.
Effective nuclear charge stays about the same when one goes down a group.
Concept introduction:
The Modern Periodic law states that the physical and chemical properties of the elements are a periodic function of their
(b)
Interpretation:
To state whether the given statement is true or false.
Group 17 elements have seven electrons in their outer level.
Concept introduction:
Outermost electrons are those which take part in bonding. Each element has different number of outermost electrons depending upon the group to which it belongs and its electronic configuration as well.
(c)
Interpretation:
To state whether the given statement is true or false.
Energy is given off when a electron is removed from an atom.
Concept introduction:
Electrons are held in an atom by stronger forces of attraction present between the nucleus and the electrons. For the removal of electrons energy is to be given off to overcome these attractive forces.
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Chemistry: Principles and Reactions
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