1.1 Structure of the atom

Question 1

What is the nucleons?

Answer 1

Protons and neutrons

A is the mass number = p+n

Question 2

What is a nuclide?

Answer 2

species of nucleus characterized by two numbers Z and A

Question 3

What is the importance of valence shell?

Answer 3

It is concerned with the chemical, thermal, optical and electrical properties of the element.

Question 4

Which shell is related to X-rays and their interactions?

Answer 4

The inner shell.

Question 5

Which part of the atom is concerned with radioactivity?

Answer 5

nucleus.

Question 6

Which type of binding between AgBr?

Answer 6

Electrostatic attraction.

Question 7

What is the electronvolt (eV)?

Answer 7

The energy acquired by an electron when it is accelerated through a potential difference of 1V.
1 J = 1 V X C

Question 8

What is unit of absorbed dose?

Answer 8

gray (Gy), 1 Gy= 1 J/ kg

Question 9

pico
nano
micro
milli
kilo
mega
giga
tera

Answer 9

10-12
10-9
10-6
10-3
10+3
10+6
10+9
10+12

Question 10

What are factors affecting binding energy?

Answer 10

1- The shell (eK > eL ….).

2-The element atomic number.