The standard number of that atom.
Every isotope of magnesium has 12 electrons.
An isotope of a chemical element is an atom that has the same number of protons (this also means this atom has the same atomic number) and electrons, but has a different numbers on neutrons. The isotope is radioactive if it has too many neutrons in the nucleus and because of this the isotope is unstable. The half-life of a radioactive isotope is a time period. When the isotope is at the end of the period it's weight will be the half of the starter weight.
If 42 is the atomic number then there is 42 electrons in isotope.
The isotope Cr-54 has 24 electrons.
Protons: Any atom of lanthanum has 57 protons. Neutrons: Lanthanum has 30 radioactive isotopes with neutron numbers ranging from 60 to 96 but the only stable isotope(139La) has 82 neutrons. Electrons: The number of electrons is normally the same as the number of protons.
92
There are 16 electrons in an O2 molecule. Each oxygen atom contributes 8 electrons, totaling 16 electrons in the molecule.
Every isotope of cobalt has 27 electrons.
Chlorine has an atomic number of 17. Thus, neutral chlorine will have 17 protons and 17 electrons. Chlorine's most common isotope is 35Cl, meaning it has 35 - 17 = 18 neutrons. *****************************2nd Opinion************* Since the question was about a chlorine molecule, shouldn't the answer be about Cl2? 34 p and 36 n
Each isotope has a specific radioactive decay.
Seven.
A NADH molecule stores 2 electrons.