Atoms

Assertion:Atomic number is a more fundamental property of an element than its atomic mass. Reason:Atomic number is equal to number of protons in an atom.

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order. (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model

Atomic number of hydrogen is 1 and the atomic number of fluorine atom is 9. Write the formation of hydrogen fluoride (HF).

The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are:

Atom with the same atomic number and different mass numbers are called

The number of hydrgen atom(s) attached to phosphours atom in hypophosphorus acid is :

Define: (a) Atom (b) Molecule (c) Atomicity (d) Formula

Atomic size of neon is ............. (more/less) than the atomic size of fluorine.

Define atomic radius of an atom.

The atomic mass and atomic number of lead are 208 and 82. The atomic mass and atomic number of bismuth are 209 and 83. The "neutron"//"proton" ratio in an atom