It would by definition be Helium (atom number = number of protons = 2) but the nucleus of the stable isotope 4He also contains 2 neutrons (the mass number = total number of p's and n's = 4)
If you build an atom using two protons, two neutrons and two electrons you would build an atom of Helium. To be more-precise, this would create Helium-4 the common isotope of Helium.
No, an atom cannot gain or lose protons. Protons are the positively charged particles within the nucleus of an atom, and changing the number of protons would change the atom's identity. However, atoms can gain or lose electrons, which affects their charge but not their identity.
Adding protons would make it a different element. If Electrons were added to an atom, it would start behaving like another element. For example Fluorine would try to be more like Neon. All elements want balance, so they get as close in relation to these noble gases as possible by sharing, stealing, and giving up electrons
The atomic number of carbon is 6. Therefore, carbon has 6 protons. If it gained two more protons, it would have 8 and would become oxygen.
If the atom has more electrons than protons than the atom will be negative.
Germanium has thirty two protons. If two were removed, the atom would have thirty protons, making it Zinc.
If you remove two protons from a germanium atom, it would become a selenium atom. This is because germanium has 32 protons, while selenium has 34 protons.
The atom in a normal state would have two protons to match the two electrons, making the overall charge zero. If the atom is an ion, it would have an mismatched number of protons and electrons, giving it a positive or negative overall charge.
If you build an atom using two protons, two neutrons and two electrons you would build an atom of Helium. To be more-precise, this would create Helium-4 the common isotope of Helium.
If you remove two protons from a germanium atom, it would become a gallium atom. Gallium has atomic number 31, while germanium has atomic number 32. By removing two protons, the atomic number decreases by two, hence the change to gallium.
Protons and neutron
Nucleus (and it consists of protons and neutrons).
Neon atoms have 10 protons.
The number of protons varies for different elements. For example, Hydrogen has only one proton in each atom. That's what makes hydrogen hydrogen. If it had two protons, it would be helium. If there were no protons, then it wouldn't be anything.
Helium
No, an atom cannot gain or lose protons. Protons are the positively charged particles within the nucleus of an atom, and changing the number of protons would change the atom's identity. However, atoms can gain or lose electrons, which affects their charge but not their identity.
The atomic number of an atom is the number of protons in the nucleus of that atom. The number of electrons will equal the number of protons in that atom if that atom is a neutral one. Other than that, we would have to know the atomic number (which is the number of protons that atom has), and the overall charge of the atom. With that information, we could discover how many electrons that atom had by simple mathematics. If an atom had 11 protons and a charge of +1, it would have one less electron than the number of protons, or 10 electrons. If an atom had 53 protons and a charge of -1, it would have 54 electrons. The ratio from atomic number to the number of protons in an atom is 1:1. The elements are categorized by the number of protons they have, as that is the difference between two elements. Conceptually, atomic number and proton number are the same.