Chapter 4, Problem 103A

Interpretation Introduction

Interpretation:

The symbols of three isotopes of silicon, silicon-28, silicon-29 and silicon-30 should be written.

Concept introduction: Semiconductors  materials such as silicon, germanium, have electrical properties between conductors and insulators.

Answer to Problem 103A

There are three isotopes of silicon (Si) exist in the nature: $Si,Si,Si$.

Explanation of Solution

a

There are 4 valence electrons in the outermost shell of the silicon. It shares its electrons with other atoms to from covalent bond.

Isotopes of an element have same Atomic Number and different Mass number, they are represented as:

$\text{X}$

Where, $\text{A = Mass number}$

$\text{Z = Atomic number}$

Thus, the isotopic symbol for silicon-28 is $Si$, silicon-29 is $Si$ and silicon-30 is $Si$.

Conclusion

The three isotope of silicon, silicon-28, silicon-29 and silicon-30 represented as $Si,Si,Si$ respectively.