Protons and neutrons what is the answer.
The nucleus contains the mass.
One NaCl molecule contains one sodium (Na) atom and one chlorine (Cl) atom.
the nucleus is the center of an atom that contains the positively charged protons and the neutrally charged neutrons. It contains most of the mass of the atom.
The nucleus, made up of protons and neutrons, contains most of an atom's mass.
It is the nucleus. It is the middle of the atom
An atom contains protons and neutrons in the nucleus (though Hydrogen does not have neutrons) and electrons orbiting the nucleus.
only contains one atom
The atomic nucleus is the part of the atom that contains protons and neutrons.
The centre of an atom is called the nucleus, and it contains only protons and NEUTRONSbut no electrons at all.
It contains protons and neutrons and no electrons.
Boron, Symbol= B Atomic Weight= 10.811
A substance that contains only one type of atom is called an "element".