Three
Carbon is a non metal element. There are 12 electrons in a single atom.
Sulfur is a non metal element. There are 16 electrons in a single atom.
The number of protons of an element does not change when it undergoes a chemical change. It is the number of electrons that changes. Sulfur has 16 protons, and so does the sulfide ion. However, sulfur has 16 electrons, while the sulfide ion (S2-) has 18 electrons.
If it is neutral than it has 16 electrons because it is equal to the number of protons. If it is 33 sulfur -2 than it has 18 electrons
Group 1 - 1 valence electron Group 2 - 2 valence electrons Group 13 - 3 valence electrons Group 14 - 4 valence electrons Group 15 - 5 valence electrons Group 16 - 6 valence electrons Group 17 - 7 valence electrons Group 18 - 8 valence electrons Groups 3 - 12 technically have 2 valence electrons, but will also use d sublevel electrons as valence electrons as well. So their number of valence electrons vary (even for the same element) and require some memorization.
3
16
There are no difference in the number of shells in magnesium and sulphur. Both elements contain 3 shells. However, the total number of electrons in the shells are different. Magnesium has 12 electrons in its shells whereas sulphur has 16 electrons in its shell. In addition, the electrons in the valence shell (outermost shell) are also different. Magnesium has 2 electrons in its valence shell whereas sulphur has 6 electrons in its valence shell.
The table was organized so that elements of similar properties are in the same group. What (partly) determines reactivity is the number of electrons an atom has in it's ground state. . Within the atom electrons are organized in shells. Atoms are stable when they have 8 electrons in their outer shell (for hydrogen and helium it is 2 electrons.) . Elements of: Group 18 have 8 electrons in their outer shells Group 17 have 7 electrons in their outer shells Group 16 have 6 electrons in their outer shells Group 15 have 5 electrons in their outer shells Group 14 have 4 electrons in their outer shells Group 13 have 3 electrons in their outer shells Groups 3-12 have varied number of electrons in their outer shells Group 2 have 2 electrons in their outer shells Group 1 have 1 electron in their outer shells
This element is sulfur; the electron configuration of sulfur is [Ne]3s23p4. Sulfur has three electron shells cotaining 2, 8 and 6 electrons. The last six are valence electrons.
Sulfur has 16 electrons in three shells, 2, 8, and 6 in the first, second and third shells
an oxygen atom has 16 electrons, 2 shells and 4 neutrons and protons.
Sulfur's atomic number is 16. Therefore, neutral sulfur has 16 protons and 16 electrons. Since we're dealing with S2-, we need to add 2 electrons to that, giving 18 total.
16 electrons
Oxygen-16 has 16 electrons (the 16 refers to the number of electrons, so Oxygen-15 if it exist, will have 15 valence electrons)
Sulfur has three shells.
The atomic number is 16, so a sulfur atom has 16 protons in the nucleus and 16 electrons in the electron cloud.