Protons and neutrons exist in the nucleus of an atom. The electrons in an atom exist outside the nucleus. All elements have at least one proton; in fact the number of protons, which are positively charged, determines which element it is. Normally, all the elements except hydrogen (H) also contain neutrons, which have no charge (they're neutral, hence their name.)
Atoms have equal numbers of protons and electrons.
The neutron. Unless it is an isotope, which has a different number of neutrons.
The nucleus
Nope, the atomic number is equal to the number of protons.
Yes, a neutron is smaller than an atom. Neutrons are subatomic particles found within the nucleus of an atom, along with protons, and are about the same size as protons. Atoms consist of a nucleus made up of protons and neutrons, surrounded by electrons in orbit.
A neutron. Protons are positively charged.
Atoms have equal numbers of protons and electrons.
The neutron. Unless it is an isotope, which has a different number of neutrons.
The nucleus
Protons and neutrons have almost the same mass.
Atoms are made up of Protons, Electrons and sometimes there are Neutron present. They are the basic building blocks.
Nope, the atomic number is equal to the number of protons.
A neutron is the subatomic particle that has no charge. It is found within the nucleus of atoms and contributes to the stability of the nucleus by balancing the positive charge of protons.
Adding a neutron to an atom's nucleus increases the atom's mass by the mass of the neutron itself. Neutrons are more massive than protons, so adding a neutron will increase the atom's total mass without changing its charge.
A neutron star is not made of atoms; it is made of neutrons. It is electrically neutral because the matter that collapsed to form it contained the same number of electrons and protons.
The atoms having 2 protons only in nucleus is not stable but 2 protons with 2 neutron in Helium nucleus are very stable.
Protons and neutrons have about the same mass, with the neutron being slightly more massive.