Advertisements
Advertisements
प्रश्न
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
Advertisements
उत्तर
Atomic number (11) of sodium conveys information that the number of protons and electrons is the same.
Mass number (23) of sodium indicates the sum of protons and neutrons.
APPEARS IN
संबंधित प्रश्न
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
Define the term ‘atomic number’ of an atom.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 2, how many electrons does it have.
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
An element ‘A’ has mass number 23 and atomic number 11. State the –
- no. of neutrons in its shell,
- electronic configuration of the element ‘A’.
Explain the following terms.
- Proton
- Electron
- Neutron.
The Atomic number of an element is 20. It has ______ valence electrons.
What are the letters A, Z, and X stand for?
If M is the atomic mass and A is the mass number, then packing fraction is given by ______.
