Answer:
d.
Explanation:
With an ionic bond we have an elector transfer but with a covalent bond the electrons are shared to form a 'molecular' bond.
I don't know which one I should answer
The rates of decay of radioactive elements
The age of a rock in years is called its absolute age. Geologists find absolute ages by measuring the amount of certain radioactive elements in the rock. When rocks are formed, small amounts of radioactive elements usually get included.
The answer from this questions is the letter
B. He should not use his opinions as evidence.
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