How to balance the valencies
Answers
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons
Explanation:
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example :- Potassium has a valency of one. Oxygen has a valency of two. The formula is K2O.
Answer:
Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.
Explanation:
To write the chemical formula for a compound it is best to use the S.V.S.D.F system.
S - write down the symbols of both the elements involved.
V - beneath each symbol, write it’s valency. Memorising the above table is useful.
S - swap the valencies over.
D - if the valencies can be simplified, divide them both by the smaller of the two numbers. If one of the numbers is already one, then they cannot be divided and simplified any further.
F - write the formula.
Potassium has a valency of one. Oxygen has a valency of two. The formula is K2O.
