physics

Question

1- Determine the value of A, Z and X for the equation shown below:

 

 

The value for A is:

 

 

 

 

The value for Z is:

The chemical symbol for X is:

 

 

 

Answer 1

1a).

Given chemical equation is

.

In above equation

Z = Atomic Number.

A = Mass number = Number of Nucleons = The total number of protons and neutrons in the nucleus of an atom

X = Symbolic representation of the Chemical element.

In any balanced equation

Total of mass numbers or Atomic Numbers of each molecule on Left side and right side are equal.

Equate Mass numbers both sides of given equation.

12 + 2 = A + 1

A + 1 = 14.

A = 14 - 1

A = 13.

The value for A is 13.

Answer 2

1b).

Equate Atomic Numbers both sides.

6 + 1 = Z + 1

Z = 6.

The value for Z = 6.

 

Answer 3

1c).

Chemical symbol X can be determined from the Atomic Number of the element.

From the answer 1(b)

Atomic number Z = 6.

From periodic table Carbon (C) has an atomic number 6.

The Chemical symbol X indicates " C ".