Answer:
Explanation:
a) chalcogens are elements of group 16 of periodic table.
Tellurium have mass no 125. atomic no 52 so ¹²⁵Te₅₂ is the symbol .
b) halogen ( group 17 elements) radioactive isotope is astatine
atomic no is 85 and mass no may be 210 ( most stable) ²¹⁰At₈₅
c) neon gas is used in lighting .It is a noble gas .
²⁰Ne₁₀ is the symbol
d) lightest alkali metal Beryllium ( Be) .Isotope having 3 neutrons is
⁷Be₄ .
Answer:
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Explanation:
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Odorants such as Citronellal, Linalool, Nerolidol
Answer:
Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:
