Advertisements
Advertisements
Question
Explain the Mass number with example.
Advertisements
Solution
The mass number of an element is equal to the sum of the number of protons and the number of neutrons present in it.
Example: Number of protons in carbon = 6
Number of neutrons = 6
Hence mass number = Number of protons + Number of neutrons
= 6 + 6
= 12
RELATED QUESTIONS
Multiple Choice Questions
The sub atomic particle with negative charge is
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
Fill in the following blanks in respect of an atom of an element
| No. of protons | No. of neutron | Mass number | Atomic number | No. of electrons | Symbol |
| 11 | 12 | ___________ | ___________ | ___________ | ________ |
Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
- Has four electrons in its valence shell?
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
What is mass number of an atom?
The No. of electrons in the outermost shell of the atom of an inert gas ______.
When an atom gives electrons from its outermost shell, it becomes ______ charged.
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
What is the relation between mass number & atomic number?
