progressions

The oxides of elements in a period become progressively more acidic as one goes from left to right in a period of the periodic table. For example, in third period, the behavior of oxides changes as follows:..

In group 13, the characteristic group oxidation state of + 3 is known but the + 1 state gets progressively stabilized on going down the group. It is particularly favored by Tl. This is a consequence of the so called 'inert pair effect' which also accounts for the stability of the di..

I shall have finished my studies by that time. Before you reach there, the train will have left. The Future Perfect Continuous tense indicates an action as being in progress over a period of time that will end in the future..

If three quantities are in harmonic progression, then the middle quantity is called the harmonic mean between the other two. Example: 1/3, 1/7, 1/11 are in H.P., then 1/7 is the middle term. Hence 1/7 is the harmonic mean between 1/3 and 1/1..

An oscillator, in actual practice, almost always lies in a resisting medium, like air, oil etc., where part of its energy is dissipated in overcoming the opposing frictional or viscous forces and its amplitude, therefore, goes on decreasing progressively. Such forces, which are non-..

Introduction - Man's quest for sources of energy is inexhaustible. Early man depended mainly on muscular energy and later began to use wind and flowing water as sources of energy. He learned the art of making and controlling fire. Fire became his source of light at night. He used fire for warmth an..

Harmonic Mean (H.M.) - If three quantities are in harmonic progression, then the middle quantity is called the harmonic mean between the other two. Example: 1/3, 1/7, 1/11 are in H.P., then 1/7 is the middle term. Hence 1/7 is the harmonic mean between 1/3 and 1/1..

The 'f' block elements are those, which in their elemental or ionic forms have partially filled 'f' orbitals. The differentiating (last) electron enters 'f' orbitals, which lie inner to the second outermost (penultimate) shell. Thus these elements are also known as inner-transition elements. There..

Science is the hallmark of progress in the realm of naturally occurring matter and energy. It is the way one has to get at the truth or at least, as close to the truth as possible. WHAT is Science? * Science is a human endeavour * Science is an interaction of human mind with the..

When the same odours continuously stimulate the receptors, they become progressively less responsive to the stimulus. Thus, we get used to the smell of a perfume worn by us and others smell it better than us. Olfactory adaptation takes place for unpleasant smell also. The latter becomes ..