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The effective nuclear charge experienced by an electron in a multi-electron atom increases when the number of nuclear protons increases. True or False?

True

Screening of the nuclear charge by core electrons in atoms is ________.

more efficient than that by valence electrons.

A tin atom has 50 electrons. Electrons in the __________ subshell experience the lowest effective nuclear charge.

5p

__________ is isoelectronic with argon and __________ is isoelectronic with neon.

Cl-, F-

Which one of the following has the smallest radius?

Cl

Oxides of most nonmetals combine with water to form __________.

an acid

The alkali metal that is used to treat manic-depressive illness is __________.

Li

Which noble gas has the lowest first ionization energy?

Radon

Which periodic table group contains only nonmetals?

8A

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