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There is more number of substances in the universe than 109 elements. Most matter we run into on a day-to-day basis is composed of compounds-substances in which two or more elements have bonded together to form a material with unique chemical properties. One of the like compounds is water. A water molecule consists of two atoms of hydrogen bonded to one atom oxygen. Thus what is chemical bonding and why does it occur?
If we ignore the transition metals in the periodic table, it becomes apparent that every electron shell beyond the first has a total capacity for 8 valance (outer shell) electrons (the first shell has a capacity for 2 valance electrons). We can represent the actual number of electrons in an atom's valance shell by drawing each valance electron as a dot surrounding the element symbol. This is called the Lewis dot structure and some example follow:
As in turns out, atoms bond together for a very simple reason: atoms like to contain full valance shells. Most of the materials we see around us are not composed of just single specific of atoms. They are compounds, composed of molecules made up of atoms from two or more elements. The two or more atoms combine to form molecules of a compound and thus the interaction occurs in different ways between different kinds of atoms and lead to the formation of variety of bonds. The primary atomic bonds include the ionic, covalent, and metallic bonds.
a) What force is needed to give amass of 20kg an acceleration of 30m/s 2 ? b) Find the accelerating force when a car having a mass of 1.7Mg enhances its speed with a constant a
Faraday constant; F (M. Faraday) The electric charge carried through one mole of electrons (or singly-ionized ions). This is equivalent to the product of the Avogadro constant
Earth's atmosphere is separated into four layers: The troposphere (0-10 km), the stratosphere (10-50 km), the mesosphere (50-80 km), and the thermosphere (80-500 km).
Lenz''s Law states that the Nature of induced emf in the coil is such that it opposes the causes of it. It can be explained by a simple understanding of Faraday EM induction ex
An unknown tuning fork is sounded along w/ a tuning fork whose frequency is 256Hz and a beat frequency of 3 Hz is heard. What i the frequency of the unknown tuning fork?
A body of mass m1 , moving with velocity u1 collides head on with a body of mass m2 moving with a velocity u2 the two bodies stick together after the collision the loss of kinetic
Right-hand rule: A trick for right-handed coordinate systems to find out which way the cross product of two 3-vectors will be directed. There are few forms of this rule, and t
If a proton and an electron have same de Broglie wavelength, which has more kinetic energy and momentum?
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Like the centre of mass, the moment of inertia is a function of a body that is concurrent to its mass distribution. Moment of inertia gives a measurement of the resistance of a bod
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