when combining with nonmetallic atoms metallic atoms generally will

. In the VIIIA or zero group, argon does not exhibit either metallic or non-metallic character. Why does the metallic character decrease from left to right across the period, in the periodic table? The elements to the left of the periodic table have a tendency of losin..

. In the 18 or zero group, argon does not exhibit either metallic or non-metallic character. The elements to the left of the periodic table have a tendency of losing electrons easily as compared to those to the right. As we move from left to right of the period, the electrons of..

>The mass of electrons is negligible compared to the mass of the protons. Ordinary hydrogen is the only element that has no neutron in it. According to Bohr electrons revolve around the nucleus in fixed orbits called K, L, M, N etc. The energy of the shells increases as the distance form the nucleu..

. It is abbreviated Z. Mass number is defined as the sum of the number of protons and neutrons in the nucleus of the atom. It is denoted by 'A'. Atoms of the same element having same atomic number but different mass numbers are called isotopes. Isotopes show similar ch..

The hardness of metals is due to the strength of the metallic bond. In general, the strength of a metallic bond depends upon: The greater the number of valence electrons for delocalisation the stronger is the metallic bond. Smaller the size of..

We have learnt that metals that are chemically active get corroded in the presence of a moist atmosphere. Corrosion is an oxidation reaction with atmospheric oxygen in the presence of water on the surface of a metal. Iron corrodes more quickly than most other transition me..

Nitrogen does not easily combine with other elements under ordinary conditions. A molecule of nitrogen is diatomic. These two atoms have combined by mutually sharing three pairs of electrons (Fig.12.7). ..

We are familiar with the fact that the atoms of all elements, except noble gases, have an incomplete outermost shell. Consequently, most elements are reactive and they try to achieve the stability of the noble or inert gases by electron transfer or by electron sharing. After this co..

fig 1.21 - Formation of energy band in sodium metal The figure1.21 shows how the molecular orbital energy level diagram changes as the number of atoms in the crystal increases. With increase in number of atoms, the number of energy levels increases and the energy spaci..

. The atom of metallic elements contain only 1 to 3 valence electrons, therefore these atoms cannot form covalent bonds, with noble gas configurations as they will remain incomplete. Covalent compounds are bad conductors of electricity and are generally liqui..