Match the atomic numbers 10, 4, 14, 8, 15, and 19 with each of the following.
i) A solid Non metal of valency 3.
ii) A gas of valency 2.
iii) A metal of valency 1.
iv) A non metal of valency 4.
v) An inert gas.
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Answers
Answer:
A solid Non metal of valency 3 - 15 (Phosphorus)
A gas of valency 2 - 8 (Oxygen)
A metal of valency 1 - 19 (Potassium)
A non metal of valency 4 - 14 (Silicon) by the way silicon is a metalloid
An inert gas - 10 (Neon)
Answer:
A solid non metal belonging to the third period with atomic number of 15 is phosphorus with symbol P.
A metal of valency 1 is potassium with symbol K. Its atomic number is 19 and is an alkali metal.
A gaseous element with valency 2 is helium. Its symbol is He and atomic number is 2. It is an inert gas.
An element belonging to Group 2 (alkaline earth metals) is beryllium (Be). It has atomic number of 4.
A rare gas (or inert gas) is helium. Its symbol is He and atomic number is 2. Its valency is 2.
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