fourth grade science about mass & weight

Mass and Weight - Mass and weight are commonly mistaken as the same, but they are two different quantities. Now let us try to find out the differences between th..

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 being the smallest atom was chos..

The mass of an electron is 1/1840 of the mass of a hydrogen atom. Since the mass of hydrogen atom is almost 1 a.m.u., the relative mass of an electron is 1/1840 a.m.u. The absolute mass of the electron is 9 x 10 -28 gra..

Mass and weight are commonly mistaken as the same, but they are two different quantities. Now let us try to find out the differences between th..

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 express their m..

According to Newton's law of gravitation, the force of attraction is directly proportional to the mass of the body. Consider two objects of mass m separated by a distance d, then the force between them is given by the relation Two Objects of Mass m Separated by a Dista..

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 isotopes. The atomic weight of chlorine is 35.43 am..

Molecular mass expressed in grams is numerically equal to gram molecular mass of the substance.Molecular mass of O 2 = 32Gram molecular mass of O 2 = 32gGram molecular mass is the relative molecular mass expressed in grams.Note that relati..

The molecular mass of a substance is the relative mass of its molecule as compared with the mass of a 12C atom taken as 12-unit..

According to this law, during any physical or chemical change, the total mass of the products remains equal to the total mass of the reactants. Law of conservation of mass is also known as 'Law of indestructibility of matte..