The element found in period 4, group 2 is zirconium, Zr
Answer:
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Explanation:
Answer:
C
Explanation:
Atoms share electrons. Electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the electronegativities of the atoms are too small for the transfer of electrons (to form ions).
The answer is #1, a response to a stimulus that sends an electric impulse