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Elements in the same group have the same
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
A(n) is an atom, or bonded group of atoms, that has a positive or negative charge.
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
What is the trend in atomic radii as you move from left-to-right across a period?
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
Identify the period and group of the element that has the electron configuration Ne3s2-3p3.
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
How many electrons does an atom generally need in its outer level to be the most stable?
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
Which of the following electron configurations represents the most chemically stable atom?
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
Atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
An atom becomes negatively charged by
number of valence electrons.
He 2s2-2p3
ion
8
generally decreases
period 3, group 15
gaining an electron.
outer edge
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