Atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined

The general trend in the radius of an atom moving down a group is partially accounted for by the

A(n) is an atom, or bonded group of atoms, that has a positive or negative charge.

An atom becomes negatively charged by

Elements in the same group have the same

Most of the elements in groups 16 through 18 are classified as

Identify the period and group of the element that has the electron configuration Ne3s2-3p3.

What is the trend in atomic radii as you move from left-to-right across a period?

How many electrons does an atom generally need in its outer level to be the most stable?

Which of the following electron configurations represents the most chemically stable atom?

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