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 is its atomic number and mass number?
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element ?
What is the significance of atomic numbers in the modern Periodic Table?
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?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
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. = 3, how many neutrons does it have.
What is atomic number?
If an atom has 6 electrons in its outermost shell, it is inert.
If M is the atomic mass and A is the mass number, then packing fraction is given by ______.
