3) The modern periodic table has.
i
horizontal rows which are called
as
4) The age of rocks and fossils can be determined with the help of
isotopes.
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1
Answer:
period:-A period is a horizontal row of the periodic table.
The concentrations of several radioactive isotopes (carbon-14, potassium-40, uranium-235 and -238) and their daughter products are used to determine the age of rocks and organic remains.
Explanation:
HOPE ITS HELPFUL.
Answered by
3
Answer:
Period
A period is a horizontal row of the periodic table. A group is a vertical row of the periodic table.
The concentrations of several radioactive isotopes (carbon-14, potassium-40, uranium-235 and -238) and their daughter products are used to determine the age of rocks and organic remains.
Explanation:
hope its helpful.
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