The scout troop built a derby car to race in the championship races. The car will be pushed by four scouts who can each push with a force of 150 N. The car has a mass of 53.5 kg? What will be the derby car’s acceleration to the nearest tenth with this amount of effort being applied?

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.  

c. orbital shape i hope this is correct