Last seen: Jan 25, 2021
An atom is electrically neutral because of same number of protons and electrons. But it becomes charged, to become stable atom, loses or gains electro...
Atomic number ≠ Number of electrons, although number of protons = number of electrons because the electron’s number can change in an atom by loss, or ...
Isotopes 1. Are atoms of same element 2. Have same atomic number 3. Have different mass number 4. Number of protons and electrons are same in ...
Chlorine has two isotopes and the mass of an atom is taken as the average mass of all the naturally occurring atoms of that element. This is obtaine...
Three atomic species of hydrogen are: Name Protium - Deuterium - Tritium Symbol - - - Protons - 1 - 1 - 1 Atomic no. - 1 - 1 - 1 Neutr...
Three sub-atomic particles are electron, proton and neutron Particle → Electrons - Proton - Neutron Discovered by → J.J. Thomson - E. Goldstein - ...
Protons and neutrons present in the nucleus are called nucleons Isobaric elements have same number of nucleons in it. E.g., Element - Protons - Neut...
and - have same number of neutrons, 12 in each. and - have same number of neutrons, 14 in each.
The isotopes are 3517X and 3717X as both the atoms show same atomic number but different mass number.
The atomic number of nitrogen = 7, No. of protons = 7, No. of electrons = 7 Electronic configuration = K L M = 2 5 – Valency = 3 Because e...
When the outermost shell of an atom i.e., L, M or N are completely filled with 8 electrons in the shell, it is said an octate. Atoms would want to com...
(i) An atom with same number of sub-atomic particles is 24He No. of protons = 2 No. of electrons = 2 No. of neutrons = 2 2s.png (ii) An ato...
Both Bohr and Bury gave the distribution of electrons into different atoms by giving the formula 2n2, where n = shell number.
Protons were discovered by E. Goldstein in 1866 and neutrons were discovered by J, Chadwick in 1932.
Yes, it can be e.g. Ca and Ar has A-40 (i.e., mass number).
No, (Z = atomic number), two different atoms cannot have same atomic number.
X —> Symbol of element A —> Mass number Z —> Atomic number
Isotope of cobalt.
Atomic structure of sodium atom. 2s.png
Carbon (Protons = Neutrons = 6) Oxygen (Protons = Neutrons = 8)