Questions

Atoms are composed of three main particles called electrons, protons and neutrons. We know that, the electrons are negatively charged particles whereas protons are positively charged and neutrons have no charge.

Hence, as the number of electrons and protons are equal and they are oppositely charged, the atom will have no charge as their charges cancel each other.

The geologic time scale is subdivided into 4 units called Eon, Era, Periods and Epochs.

The hot dry summers and cool wet winters are especially suited for citrus fruits and therefore these lands are some times reffered to as the 'world's orchard land' .

Guglielmo Marconi, an Italian invetor invented Radio in 1890's.

The light reactions of photosynthesis supply the calvin cycle with ATP and NADPH.