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Most of the elements in groups 16 through 18 are classified as
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
The general trend in the radius of an atom moving down a group is partially accounted for by the
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
Identify the period and group of the element that has the electron configuration Ne3s2-3p3.
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
A(n) is an atom, or bonded group of atoms, that has a positive or negative charge.
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
Which of the following electron configurations represents the most chemically stable atom?
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
An atom becomes negatively charged by
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
How many electrons does an atom generally need in its outer level to be the most stable?
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
Elements in the same group have the same
nonmetals
period 3, group 15
decrease in the mass of the nucleus.
gaining an electron.
ion
number of valence electrons.
He 2s2-2p3
8
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