Write the Formula like this.
1.Write the symbols of elements in compound
2.Write their valencies
3.Exchange the valencies
4. Simplify( If any )
5. Write the formula
Please write with the following steps.
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Answers
Water:
water has 2 hydrogen atoms and 1 Oxygen atom.
H2O is its formula, H is having 1 (H+) valancy and O is having 2 (O-2) valancy. both together forms, H2O
Hydrogen Chloride:
HCl is the formula, H+ (+1 valancy) and Cl- (having -1 valancy) both together form, HCl
Nitric Acid:
HNO3
here there are, 1 Hydrogen atom, 1 nitrogen and 3 Oxygen atoms.
H+ NO3-
+1 Hydrogen valancy and -1 NO3 valancy.
Calcium Oxide:
CaO
one calcium atom with one Oxygen atom.
Ca++ O--
Calcium is having +2 valancy and Oxygen is having -2 valancy.
Sodium Chloride:
NaCl
One atom of sodium combine with one atom of chlorine to form sodium chloride.
Na+ Cl-
Na is having +1 valancy and Cl is having -1 valancy.
Sodium Nitrate:
NaNO3
2 atoms of sodium, one Atom of nitrogen and 3 atoms of oxygen combine to form Sodium Nitrate.
Na+1 NO3-1
valancy of sodium is +1 and nitrate ion is -1.
Carbon Dioxide:
CO2
one Atom of Carbon (C) combine with 2 Atoms of Oxygen (O) to form CO2.
Carbon has valancy of 4 and Oxygen has valancy of 2, hence one Carbon atom requires 2 oxygen atoms to form CO2 (Octet structure).
Potassium Chloride:
KCl
one atom of potassium (K) with one Atom of Chlorine (Cl) combine to form potassium chloride (KCl)
K+ Cl-
K is having +1 valancy and Chloride is having -1 valancy.
Sodium Carbonate:
Na2CO3
It has 2 atoms of sodium (Na) one Carbon (C) and three Oxygen (O) atoms.
Na+ CO3-2
sodium has +1 valancy and Carbonate ion (CO3-2) has valancy of 2 (-2).
Carbon Monoxide:
CO
it has, one Carbon atom with one Oxygen Atom.
C+2 and O-2
carbon has +2 valancy and Oxygen has -2.
Magnesium Chloride:
MgCl2
it has one Atom of Magnesium (Mg) and 2 atoms of chlorine (Cl).
Mg has +2 valancy and Chloride ion is having -1.
Potassium Carbonate:
K2CO3
It has 2 potassium (K), one Carbon (C) and 3 Oxygen (O) atoms.
K+ and CO3-2
potassium has valancy of 1 and Carbonate ion has valancy of 2.
Magnesium Oxide:
MgO
one Atom of Magnesium (Mg) with one Atom of oxygen (O) combine to form magnesium oxide (MgO).
Mg+2 O-2
magnesium has +2 valancy and Oxygen too has valancy of 2 (-2).
Zinc Chloride:
ZnCl2
It has one Zinc atom and 2 Chloride ions.
Zn+2 Cl-1
Zinc has valancy of 2 and Chloride ion is having valancy of 1.
Calcium Carbonate:
CaCO3
It has one calcium (Ca) atom, One Carbon (C) and 3 Oxygen (O) atoms.
Ca+2 CO3-2
Calcium has +2 valancy and Carbonate ion has valancy of 2 (-2).
Note: Valancy of atom I have mentioned-ve means they have extra electron to share and +ve has extra proton. electron will be share to get the stable compound. stable compound has Octet structure.