protons and neutrons
the nucleus of an atom
NEUTRONS:]
The nucleus has most of the mass (weight) of an atom. The size of the atom, however, is related to its electron cloud (i.e. to the electrons that orbit around the nucleus)
Most atoms are broken down into three parts. The atom consists of an electron, proton, and a neutron. The type of atom molecule determines how many of the protons, neutrons, and electrons are present.
The leader is oxygen - 65 %.
Protons and Neutrons compose the nucleus of an atom. Protons and nutrons weight combine to give the mass of the atom. In most atoms, the amount of Neutrons is equivalent to the amount of Protons.
an atom becomes positive when that atom gives their electron to other atom....when the atom reacts it is called ion not atom... so that means that ion has charge of ion+..... atom has to give or take( in this case give) electron to make their outer most shell full
the atomic number <<< apex : )
The subatomic particles that contribute most almost no weight to an atom are electrons at various energy levels. Isotopes of the same element differ from each other only by the number of neutrons.
round the atomic weight to the nearest whole number.
ATP
Most of the mass in an atom is in the nucleus. The protons and neutrons are about the same weight, 1 amu. The elecrtons are 1/1840 of the mass of an proton. Neutrons are 2000 times heavier than electrons and protons have an equal mass of neutrons