A graph of coal reserves in the United States versus time slopes downward.

If coal production remained constant, coal consumption .

Which term best completes the sentence?

decreased

fluctuated

stayed the same

increased

increased

Explanation:

I believe to be increased ,because the coal is a natural resource to be used.

i really hope it helps

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.