Question 8

the only metal that is a liquid at room temperature is

a)silver

b)zinc

c)mercury

d)sodium

Mercury

Explanation:

Mercury is the red liquid in thermometers. If it was a solid, how would it move up and down to show what temperature it was? Its melting point is at -37.89  degrees Fahrenheit.

The metal is C) mercury.

Mercury is a compound component with the symbol Hg and nuclear number 80. It is initially known as hydrargyrum. An overwhelming, brilliant d-square component, mercury is the main metallic component that is fluid at standard conditions for temperature and weight.

Mercury is available generally as cinnabar (mercuric sulfide). The red color vermilion is acquired by pounding regular cinnabar or engineered mercuric sulfide.

Mercury has wide range of application and one among them is its usage in thermometer.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.