7. Give two example for each of the following:
a. Monovalent element
b. Divalent element
c. Trivalent element
d. Quadrivalent element
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7. Give two example for each of the following:
a. Monovalent element
b. Divalent element
c. Trivalent element
d. Quadrivalent element
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monovalent hydrogen
divalent oxygen
trivalent nitrogen
quadrivalent carbon
Answer:
a . Helium
b. chlorine
c . ozone
d. Phosphorus
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