protons and neutrons
The nucleus of an atom CANNOT itself contain atoms.
protons and neutrons
All atoms of sodium must contain 11 protons in their nucleus.
All atoms of the same element contain the same number of protons in the nucleus. This is what defines the element and gives it its unique characteristics.
All the lithium atoms contain the same number of protons.
Most hydrogen atoms don't contain any neutrons. Deuterium atoms are hydrogen atoms with one neutron each, and tritium atoms are hydrogen atoms with two neutrons each, but most hydrogen atoms are protium atoms, with no neutrons at all. All other atoms in the universe except protium contain at least one neutron each.
The conclusion was that an atom contain a positive nucleus.
Atoms contain a nucleus which has protons and neutrons and outside is a cloud of electrons.
An element can be identified by the number of protons in the nucleus of its atoms.
An atom contains protons, neutrons, and electrons, electrons being the one that moves around the nucleus. The other two are in the nucleus.
Atoms contain in the nucleus protons and neutrons (formed from quarks and gluons) and electrons.
All atoms contain a positively charged nucleus and negatively charged electrons.