Answer:
The answer is: the number of unpaired valence electrons
Explanation:
The valence electrons are the number of electrons present in outer shell of an atom that participate in chemical bond formation, if the outer shell is not completely filled.
Covalent bond formation occurs when two atoms contribute one valence electron each to form a bond. Thus the number of covalent bonds that an element can form, can be determined by the number of unpaired valence electrons.
Therefore, the nature and the number of bonds formed by the element and the chemical properties of the element can be determined by the number of valence electrons present in the outer shell of the element.
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Answer:
identify the atoms on each side.
Count the atoms on each side.
Use coefficients to increase the atoms on each side.
Check to make sure you have the same number of each type of atom on each side.
Explanation:
The concept behind balancing chemical equations is to ensure that they comply with the law of conservation of matter. This helps to make chemical equations quantitatively meaningful.
- First, identify the atoms on each side of the expression.
- Then count these atoms.
- Assign appropriate numeric coefficient to the species.
- Then check to make sure there are equal number of each type of atoms on each side.
The subscript of the formula must not be changed in an attempt to balance a chemical equation.
A because bubbling is considered a chemical property
The correct answer is C ) the number of atoms of each element is the same in both the reactants and products.
For example this equation the combustion of methane CH4:
CH4 + O2 → CO2 +H2O
this is not balanced equation:
as we have the no.of C atoms on the right side = the atoms on the left side = 1
but the no.of H atoms on the right side = 2
and no.of H atoms on the left side = 4
so to get the balanced equation we have to make no.of atoms equal on both sides:
So, we put 2H2O instead of H2O
CH4 + O2 → CO2 + 2H2O
now the no of O atoms on the right side = 4
and the no.of O atoms on the left side = 2
so, we put 2O2 instead of O2 to make no.of O atoms equal on both sides
So we finally get the balanced equation:
CH4 + 2O2 → CO2 + 2H2O
-have 1 C atom on both sides
-have 4 H atoms on both sides
-Have 4 O atoms on both sides
So the equation will be balanced when no.of atoms of each element are the same in both the reactants and products
