1pt The heaviest concentration of asteroids lies in a belt between
and
O A. Mars and Jupiter
OB. Venus and Earth
O C. Jupiter and Saturn
OD. Uranus and Neptune
E. Mercury and Venus

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.