Advertisements
Advertisements
प्रश्न
What is meant by the 'atomic number of an element'?
Advertisements
उत्तर
An atomic number of an element is the number of protons in the nucleus of an atom.
APPEARS IN
संबंधित प्रश्न
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
If an atom ‘A’ has atomic number 19 and mass number 39, state –
- Its electronic configuration.
- The number of valence electrons it possesses.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. Mass number of an atom is the number of protons and | A: Electron |
| 2. The sub-atomic particle with a negligible mass. | B: Argon |
| 3. An atom having stable electronic configuration. | C: Nitrogen |
| 4. A molecule formed by sharing of electrons [covalency] | D: Sodium |
| 5. A metallic atom having unstable electronic configuration. | E: Neutrons |
Name the 3 sub-atomic particles of an atom.
‘Z’ is denoted by ______.
Mass No =______ + No. of Neutrons.
Element ‘P' has electronic configuration 2,8,8,1. The number of chlorine atoms present in the chloride of ‘P’ is ______.
