Advertisements
Advertisements
Question
Define atomic mass unit. What is its symbol ?
Advertisements
Solution
Atomic mass unit can be defined as one twelfth (1/12) of the mass of an unbound atom of carbon-12. The atomic masses of all the elements are determined by comparing the mass of their atom with that of the carbon-12 atom.
Atomic mass unit = 1/12 the mass of a carbon-12 atom
(b) The symbol of atomic mass unit is “u”.
APPEARS IN
RELATED QUESTIONS
Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate
Give two symbols which have been derived from the "English names" of the elements.
The anion of an element has ______.
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Chloride
Fill in the blank:
Symbol represents _____ atom(s) of an element.
State what a chemical formula denotes.
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Na1+ Cl1-
Give the symbol of the following element:
Phosphate
Write the chemical formula of the following:
calcium sulphide
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
