Which element of the third period has the highest first ionization energy?

a.
silicon (si), a metalloid

b.
sulfur (s), a nonmetal

c.
sodium (na), a metal

d.
argon (ar), a noble gas

D: Argon

Explanation:

Noble gases have the largest ionization energies.

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explanation:

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

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explanation: