why is birthday cake an ice cream flavor if there are many flavors of birthday cake. Like you have different flavors of Ice Cream Cake, but no flavors of birthday cake ice cream

tbh i dont know. Never really thought about it like that but you're right

Explanation:

nice picture btw

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.