Evidence for the Big Bang Theory Group of answer choices

The amount of Lead and Iron in the Universe

Discovery of the Cosmic Background Radiation

Stars are like fires from the explosion

2nd one

Explanation:

Big bang echo other ones make no sense.

i'm pretty sure its b i might be wrong though!

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.