Description : 1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science
Last Answer : a) It is because nuclear charge increases due to increase in atomic number, therefore, force of attraction between nucleus and valence electrons increases, i.e. effective nuclear charge increases, hence ... element is ‘F’ because it can gain electrons easily due to smallest atomic size.
Description : What is the atomic mass 16 of O ?
Last Answer : O is a chemical signal. O = oxygen. This is what is meant by the atomic mass of oxygen 18. Atomic mass of an element = number of protons + number of neutrons.
Description : Making use of the tables of atomic masses, find: (a) the mean binding energy per one nucleon in `O^(16)` nucleus (b) The binding energy of neutron and
Last Answer : Making use of the tables of atomic masses, find: (a) the mean binding energy per one nucleon in `O^( ... and an alpha-particle in a `B^(11)` nuclues.
Description : The order of increasing size of atomic radii among the elements O,S,Se and As
Last Answer : The order of increasing size of atomic radii among the elements O,S,Se and As A. `AsltSltOltSe` B. `SeltSltAsltO` C. `OltSltAsltSe` D. `OltSltSeltAs`