why pb(no3)2 has a subscript 2 outside the brackets??
please explain
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Explanation :-
The subscript "2" after the brackets indicates that there are 2 nitrate ions (NO3-). In order to figure out how many N atoms are present, you must multiply the subscripts (in this case 1 x 2 = 2).
In such a formula, the subscript outside the parentheses means that to count atoms, you must multiply that subscript by the numbers of atoms inside.
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Explanation:
Atomic mass (ma) is the mass of an atom. A single atom has a set number of protons and neutrons, so the mass is unequivocal (won't change) and is the sum of the number of protons and neutrons in the atom. ... Atomic weight is a weighted average of the mass of all the atoms of an element, based on the abundance of isotopes.
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