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Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of Mass in the International System (SI) is the kilogram (kg).

The Molar Mass of a compound defines the Mass of 1 mole of that particular substance and number of grams per mole of a compound. In other words, the Molar Mass is the total Mass of all the Atoms in grams that make a mole of a particular molecule. Therefore,

Mole Concept is known as the method used to express the amount of substance. A mole is defined as the amount of substance containing the same number of different entities (such as Atoms, Ions, and molecules) as the number of Atoms in a sample of pure 12C weighing precisely 12

The Atomic Mass of an element is the average Mass of the Atoms of an element measured in Atomic Mass unit (amu, also known as daltons, D). The Atomic Mass is a weighted average of all of the isotopes of that element, in which the Mass of each isotope is

An ion is a charged Atom or molecule. It is charged because the number of Electrons do not equal the number of protons in the Atom or molecule. An Atom can acquire a positive charge or a negative charge depending on whether the number of Electrons in an Atom is

Valency is the number of Atoms of a particular element that is combined with one Atom of another element to form a molecule. Valency is also known as molecular weight. Valency is a measure of the combining power of an Atom. The Valency of an element is determined by the

Atomic Radius or Atomic Radii is the total distance from the nucleus of an Atom to the outermost orbital of its electron. We define the Atomic Radius of a chemical element as: The mean or typical distance from the centre of the nucleus to the boundary of the surrounding shells

Sodium chloride is an ionic compound with the chemical formula NaCl. Sodium chloride is also known as salt. It occurs in oceans and sea waters. It is also found as rock salt.

molecule, a group of two or more Atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. representations of molecular structure. Category: Science & Tech.

An Atom is a particle of matter that uniquely defines a chemical element. An Atom consists of a central nucleus that is surrounded by one or more negatively charged Electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.