The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.
The relative Atomic Mass is the average atomic mass number of all the known isotopes of an element.
The mass number of an atom is obtained by totaling the number of protons and neutrons.
The mass number of an atom is obtained by totaling the number of protons and neutrons.
Protons in each atom.
Protons and neutrons.
Add the Neutrons and Protons. The electrons are irrelevant in the mass number.
i want to what is the procedure of re-totaling of marks??????
The mass of an atom is obtained dividing the atomic weight of an isotope by the Avogadro number.
The oxidation number of IO3 is +5. Each oxygen atom in the IO3 ion has an oxidation number of -2, totaling -6 for all three oxygen atoms. Since the overall charge of the ion is -1, the iodine atom must have an oxidation number of +5 to balance the charges.
The chemical formula for ammonia is NH3. It consists of one nitrogen atom and three hydrogen atoms, totaling four atoms in one molecule of ammonia.
To calculate the atomic mass of an atom, you would add the number of protons and neutrons together. In this case, the atom has 19 protons and 20 neutrons, totaling 39 nucleons. The atomic mass of this atom would be approximately 39 atomic mass units (amu).
If the K and L shells of an atom are full, the atom will have 18 electrons. The K shell can hold 2 electrons and the L shell can hold 8 electrons, totaling 10 electrons in both shells. Therefore, if both the K and L shells are full, there will be 18 electrons in the atom.
Calcium oxide has 20 electrons from the calcium atom, and 8 electrons from the oxygen atom, totaling 28 electrons.