1 |
The mass of an atom is almost due to the. |
Electron
Proton
Nucleus
Neutrons
|
2 |
Formula showing maximum number of electrons in a shell. |
n2
2n2
3n2
4n2
|
3 |
How many periods are there is the Periodic table. |
Five
Six
Seven
Eight
|
4 |
Atomic number of element presetnin period 2 and group 15 of the periodic table. |
4
5
6
7
|
5 |
The particle of an atom having negative charge on it. |
Electron
Proton
Neutron
Nucleus
|
6 |
The total numebr of electrons which M shell can accommodate |
2
8
18
32
|
7 |
Letter K is used to express theshell around the nucleus of an atom. |
1st
2nd
3rd
4th
|
8 |
The central part of an atom is called. |
Electron
Proton
Neutron
Nucleus
|
9 |
An element with fifteen protons in its atomic nucleus has atomic numebr. |
5
10
15
20
|
10 |
Microorganism taht cause diseases in humna body are called. |
Infection
Pathogen
Antigen
Phagocytosis
|