Using a periodic table, how can I determine the number of protons, neutrons and electrons in a given element?

Answer 1

the protons and neutron are the same as the atomic number of the element!

Answer 2

The protons are the same as the atomic number (by definition). The number of electrons are the same (normally). The number of neutrons varies depending on the isotope of the atom. Hydrogen can have zero, one, or two isotopes (for example), though most hydrogen has none. Some elements have several different isotopes. There is no way from looking at the periodic table to determine the number of neutrons.

Answer 3

The number of protons equals the number of electrons, and both are equal to the atomic number.

The atomic mass is equal to the protons plus the neutrons, so subtract the atomic number from the atomic mass to calculate neutrons. A word of warning: if there are two or more stable isotopes, this may only produce an average.

Answer 4

Yes! The atomic number is the number of protons and electrons, plus, if you round off the atomic mass and subtract the atomic number, you get the average number of neutrons. (Let's take Helium. The atomic number is 2, so there are 2 protons, and 2 electrons. The atomic mass rounds off to 5, and 5-2 is 3, so by average there are 3 neutrons.)

Answer 5

good thing to know in chemistry. With normal elements (i.e. not isotopes), the number of protons is usually the same as the atomic number. The same is true for electrons. Protons have positive charges and electrons have negative charges, so we need equal numbers to have a 0-charge element

Answer 6

The protons are equivalent to the atomic type of the component. And protons are equivalent to the style of electrons. to locate neutrons you're taking the atomic mass minus the atomic volume. (same as protons and electrons) =D wish I helped

Answer 7

the atomic # is the # for all of them (not together).