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
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
Fill in the following blanks :
| Atomic Number | Mass Number | Protons | Neutrons | Electrons | Symbol |
| 10 | 22 | _________ | _________ | _________ | _________ |
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with 6 valence electrons
Match the atomic numbers 4,8,10,15 and 19 with each of the following:
An element which does not form ion
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
The Atomic number of an element is 20. It has ______ valence electrons.
‘Z’ is denoted by ______.
State the term for the following:
The amount of substance which contains the same number of units as the number of atoms in carbon-12.
An element has 2 electrons in its N shell.
What is its atomic number?
