electronic configuration of 1 50 elements with their atomic mass & number

The scale in which the relative atomic masses of different atoms are expressed is called atomic mass unit scale. Atomic masses are not expressed as whole numbers because natural elements are mixtures of two or more i..

. Relative atomic mass of an element is the number that represents, the number of times one atom of the element is heavier than 1/12 t h of the mass of one atom of carbon Thus relative atomic..

Experiments have determined that the mass of an atom is very small, ranging from 1.7x10 -24 g to about 4.0x10 -22 g. It is very difficult to accurately weigh a bunch of atoms, as they are extremely light, small, and invisible; they weigh too little for us to ..

The nuclei of atoms is made up of protons and neutrons. These two components of the nucleus are referred to as nucleons. The electrons occupy the space outside the nucleus. Since an atom is electrically neutral, the number of protons in the nucleus is exactly equal to ..

In this step, energy equal to the ionization energy is absorbe..

Electron affinity is the amount of energy released when an electron is added to an isolated gaseous atom. Atom (g) + electron (g) Anion (g) + energy Electron affinity is the ability of an atom to hold an additional ..

Electron affinity is the amount of energy released when an electron is added to an isolated gaseous atom..

The first row of elements contains only two elements hydrogen and helium. Hydrogen (Z = 1) has only one electron and it goes to 1s orbital. In helium (Z =2) atom, the second electron can also go into 1s orbit..

Third Row Elements - The third row elements are from sodium to argon. The build up of these eight elements proceeds exactly in the same manner as discussed above. Here 3s- and 3p-orbitals are filled in place of 2s- and 2p-orbitals as has been done in case of Li to Ne. ..