phosphorus atomic weight

(i) It is a soft waxy solid with garlic smell. (ii) It is poisonous in nature. (iii) It turns yellowish on exposure to light. For this reason, it is also called yellow phosphorus. (iv) It is not soluble in water but soluble in carbon disulphide. (v) It undergoes spontaneous combustion in..

Atoms and Molecules - Summary The law of conservation of mass states that the masses of the reactants and products remain unchanged. The law of constant proportions states that all pure specimens of a compound always contain the same elements combined together in the same proportion by ..

. 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..

. In 1793, he left for Manchester to teach physics and chemistry in a college. In 1801, he observed and discovered the law of expansion of gases on heating. He also enunciated the law of partial pressures and found methods of determining vapour pressure of gases. He invented the dew point hygromete..

Element Symbol Atomic Number Relative Atomic mass Actinium Ac 89 227 Aluminium Al 13 27 Americium Am 95 243 Antimony Sb 51 122 Argon Ar 19 40 Arsenic As 38 75 Astatine At 95 210 Barium B..

Atomicity of a Molecule of an Element - The number of atoms, which constitute one molecule of an element, is called its atomicity. Phosphorus: P 4 - 4 atomicity Sulphur: S 8 - 8 atomicity Oxygen: O 2 - 2 atomicity Recently a diff..

Atoms are infinitesimally small. Smaller than any thing we can imagine. One hydrogen atom, the smallest atom known, is approximately 5 x 10 -8 mm in diameter. To put that in perspective, it would take almost 20 million hydrogen atoms to make a line as long as..

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 weigh..

Atomic Mass - It is known that the atomic mass of an element/compound is not the mass of one atom or molecule of the said element/compound because they occur as a mixture of isotopes. As the atomic and molecular masses are expressed on a relative scale bas..

Name and Symbol Atomic no.(Z) Mass no.(A) Sub Atomic Particals Electronic configuration Valency Metal/Non-metal or Noble gases and Nature of element K L M N Hydrogen (H) 1 1 p = 1 e = 1 n = 0 1 &pl..