The nucleus of an atom consists of
electrons and neutrons.
electrons and protons.
protons and neutrons.
All of the above.
- The number of moles of solute present in 1 kg of a solvent is called its
- The metallurgical process in which a metal is obtained in a fused state is called
- The molecules of which gas have highest speed?
H2 at -73oC
CH4 at 300 K
N2 at 1,027oC
O2 at 0oC
- The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock’s called