There are 13 electrons in the third principal level of this atom. Which of the following could it be? a
Mn2+

b
Cl1−

c
Ni2+

d
V

e
Ge

f
Co2−

if you're asking what comes out, it's steam.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

elements make up everything, and they combine to make compounds.

the answer is c