Questions

An ionic bond is formed between two molecules when transfer of valency electrons take place between them. 

Glass is made from heating of sand. To melt sand to make glass, the temperature needed is above 1800 deg celcius.

Noida city of India has recently been chosen by the UN for the Global Continuing City-2025 Program.

Materials that usually allow electricity to pass through them are called Good conductors of electricity.

Conductors conduct electrical current very easily because of their free electrons.

Examples are :: Aluminium, Gold, Copper, Silver

Materials that do not allow or oppose electrical current & make poor conductors are called Insulators.

Examples are :: Glass, Plastic, Wood, Air,...

A duty is a task that is to be obeyed, followed and respected by all the citizens of the country or state.

When exposed to certain frequencies of radiation, such as radio waves, the subatomic particles called electrons that orbit an atom's nucleus will "jump" back and forth between energy states. Clocks based on this jumping within atoms can therefore provide an extremely precise way to count seconds.It is no surprise then that the international standard for the length of one second is based on atoms. Since 1967, the official definition of a second is 9,192,631,770 cycles of the radiation that gets an atom of the element called caesium to vibrate between two energy states.