atomic mass & atomic number

An indirect method to determine the absolute mass of an atom has been devised. The mass of a particular atom is taken as a standard unit and the masses of other atoms are related to this standard. Hydrogen being the lightest element and be..

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 the number..

The atomic mass of an element is a relative quantity and is the mass of one atom of the element relative to the mass of one carbon-12 atom. Thus,Relative atomic mass (RAM) of an element is the number of times one a..

The scale in which the relative atomic masses of different atoms are expressed is called atomic mass unit sca..

The relative atomic mass of an element expressed in grams, is known as the gram atomic mass of that element. Gram atomic masses of some of the elements are given in table. Gram Atomic Mass of Some Elemen..

Mendeleev's periodic table helped in correcting the atomic masses of some of the elements, based on their positions in the periodic table. For e.g., atomic mass of beryllium was corrected from 13.5 to 9. Atomic masses of indium, gold, pla..

The relative atomic mass of an element expressed in grams, is known as the gram atomic mass of that elemen..

The atomic mass of an element expressed in grams is called the gram atomic mass of an element. It is also called gram atom. Example: The gram atoms present in 46 grams of sodium Gram atomic mass is the relative ato..

It is very difficult to accurately weigh the number of atoms as they are extremely light and small and they cannot be seen. Indirect methods have been utilized to determine the absolute mass of an atom...

The mass of 1/12 th 12 C isotope of carbon is now the standard used for defining one atomic mass unit (a.m.u). It is equal to 1.66 x 10 -24..