Question

Q3. Find a se and correct the following statement:
a) Relative molecular mass is mass of an atom as compare to mass of carbon atom
b) Isotopes nave different physical properties and chemical properties
c) Mg + 2e -> Mg 2
d) Nonmetals donates electron to achieve stable electronic configuration of nearest noble gas.
e) Relative atomic mass is mass of a molecule as compared to mass of helium atom.
f) All noble gases have electrons in valence shell
g) Sodium has atomic number 11 and valency of -1
h) Isotopes are elements which has different number of protons in them.
i) Mass number of an element is always an integer.

Answer 1

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