SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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H
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Re
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Al
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B
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Detailed explanation-1: -(b) Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals.
Detailed explanation-2: -Hydrogen, carbon, nitrogen, oxygen, phosphorus, arsenic and selenium are the non-metallic elements in the periodic table.
Detailed explanation-3: -Nitrogen, Helium, Oxygen are all non-metallic elements.
Detailed explanation-4: -Covalent bond is formed by sharing electrons. Boron atoms form covalent bonds by sharing the valence electrons. Boron is electron deficient and has vacant p-orbitals. It is also the one and only one non-metal group thirteen.
Detailed explanation-5: -The 17 nonmetal elements are: hydrogen, helium, carbon, nitrogen, oxygen, fluorine, neon, phosphorus, sulfur, chlorine, argon, selenium, bromine, krypton, iodine, xenon, and radon.