Chapter 30.1, Problem 10SSC

To determine

To Explain:

Similarity and difference between the two pairs $C,C$ and $B,C$ .

Answer to Problem 10SSC

Pair $C,C$ has same number of protons and different number atomic mass number and for pair $B,C$ have same atomic mass number and different number of protons.

Explanation of Solution

Introduction:

  $C$ is for carbon,

  $B$ is for boron,

Where,

  $A$ : Atomic mass number

  $Z$ : Atomic number

The number of protons is equal to the $Z$ .

The neutron number is the difference of proton number and the atomic mass number.

  $A$ is the addition of total number of protons and neutrons in an atom.

The format of the symbol is,

  $C$

Where,

  $A$ : Atomic mass number

  $Z$ : Atomic number

  $Z$ is equal to the number of protons.

As $A$ is different and $Z$ seems to be same

Hence, For pair $C,C$ ,

The above pair has same number of protons, whereas different atomic mass number.

The symbol is,

  $B$

For pair $B,C$ ,

The above pair has same atomic mass number and different number of protons.

Conclusion:

For pair $C,C$ has same number of protons and different number atomic mass number.

For pair $B,C$ have same atomic mass number and different number of protons.