Electrons determine the chemical properties.
An atom's atomic number is the number of electrons.
The number of electrons is very important.
The number of electrons should equal the number of protons, otherwise you have an ion.
The number of protons in an atom is equal to its atomic number. In a neutral atom, the number of electrons is equal to that of protons. If the atom is negatively charged, add it to the number of electrons; and if positive, subtract.
the atomic core charge of an atom is the same as the number of valence electrons in the atom
the oxidation number, determined by its group on the periodic table.
Electrons determine the chemical properties of an atom.
The number of electrons in the outer shell are called Valence electrons and are important in determining how the atom reacts chemically with other atoms.
It keeps the atom at a constant charge. Too little electrons means the atom is positively charged, while too many means the atom is negatively charged.
Do you mean what does the number of protons equal? This is the atomic number of the element. All isotopes of an element will have the same number of protons, only the number of neutrons varies.
The most important is the number of electrons on the outermost level.
For any element an atom contains EQUAL number of protons and electrons. An atom has no charge. If any given atom has an unequal number of electrons and protons it is no longer an atom, but an ION.