What element contains 15 protons and 19 neutrons?
How many protons, neutrons and electrons does copper have?
How many electrons and neutrons does nickel have?
Main Isotopes of Potassium There are 25 known isotopes of potassium, three of which occur naturally: 39K (93.3%), 40K (0.0117%), and 41K (6.7%). Potassium-39 is composed of 19 protons, 20 neutrons, and 19 electrons. Potassium-40 is composed of 19 protons, 21 neutrons, and 19 electrons.
The element of potassium has the symbol K. The nucleus of an atom of potassium contains 19 protons and 20 neutrons.
The chemical symbol for Phosphorus. A 2 dimensional representation of a Phosphorus atom with 15 protons and 16 neutrons in the nucleus and 15 electrons orbiting the nucleus.
So if you look for potassium (symbol K in the periodic table), you will find that it has the atomic number of 19. This tells you that potassium has 19 protons and – since the number of protons is the same as the number of electrons- also 19 electrons.
For example, the element phosphorus (P) has an atomic number of 15 and a mass number of 31. Therefore, an atom of phosphorus has 15 protons, 15 electrons, and 16 neutrons (31-15 = 16).
Expert Answers The atomic number of chlorine is 17.
#15 – Phosphorus – P.