SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these is a formula for a covalent bond? (SELECT 2)
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Nonmetal+Nonmetal
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Metal+Metalloid
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Nonmetal+Metal
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Metalloid+Nonmetal
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Explanation:
Detailed explanation-1: -Bonds between a non-metal and a metal are ionic (For example, a Na+Cl-bond is ionic.) Bonds amongst metal atoms are metallic. Metalloid–Non-metal bonds are usually covalent. Metalloid–Metal bonds are usually ionic.
Detailed explanation-2: -Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.
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