The number of neutrons can be calculated by: ( me)

a. neutrons = mass number - electrons
b. neutrons = atomic number - mass number
c. neutrons = mass number - atomic number
d. neutrons = atomic number + electrons

Idon't understand what to put on the left lines i'm confused can anyone ?

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?