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Which of the following is least reactive?
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
Atoms of elements in Groups 3 through 12 have ____ their group number.
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
Atoms of elements in Groups 1 and 2 have ____ their group number.
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
On the periodic table, a column of elements is called a(n)
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
Groups 3-12 are commonly referred to as
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
Why are halogens considered to be the most reactive group of nonmetals?
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
On the periodic table, a row of elements is called a(n)
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
The periodic table has _____ groups.
transition metals
period
Their atoms gain only one electron to have a complete outer level.
no general rule relating their electrons in their outer energy level to
noble gases
the same number of electrons in their outer energy level as
group or family
18
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