two iodine atoms and seven oxygen atoms

Atomicity is the number of atoms of an element present in one molecule of that element. They can be monoatomic (He), diatomic (H 2 ), triatomic (O 3 ) and polyatomic (S 8 ..

Hydrogen is diatomic (H 2 ) whereas alkali metals are monoatomi..

> Iodine I 53 127 Iridium Ir 77 192 Iron Fe 26 56 Krypton Kr 36 84 Lanthanum La 57 139 Lawrencium Lr 103 257 Lead Pb 82 207 Lithium Li 3 7 Lutecium Lu 71 175 Magnesium Mg 12 24 Mangane..

Listed below are some elements that attain the octet configuration of Noble gases. Let us see how this happens. Study the given table: Elements Atomic number Electronic configuration Loss/gain of e Sodium 11 281 1 electron lost Oxygen S 16 2 elect..

>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..

The distance from the centre of the nucleus to the outermost shell of an atom is called the atomic radius of that atom (Fig. 2.1..

The atoms of group 17 have seven electrons in the outermost shell, and have the general electronic configuration ns 2 np ..

The atoms of group 17 have seven electrons in the outermost shell, and have the general electronic configuration ns 2 np 5..

. Examples: CO 2 , H 2 O, SO 3 , HCl Depending upon the number of atoms in one molecule of the element it can be classified a..

Experimentally it is determined that the mass of an atom is very small ranging from 1.7 x 10 - 2 4 g to about 4.0 x 10 - 2 2 g. These small masses are terribly impractical to work with. Thus, it became necessary to reduce the atomic..