18 protons
18 electrons
22 neutrons
18 protons and electrons and 22 neutrons.
How many protons neutrons and electrons in 40AR
32 protons, 32 electrons. Ge-72 isotope has 40 neutrons
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons
40 protons and 40 electrons.The most stable isotope of zirconium (Zr-91) has 51 protons.
K always has 19 protons, because that is what defines it as an element.40, the atomic mass is the sum of protons and neutrons. So if you subtract the number of protons from the atomic mass, you get the number of neutrons.40-19=21 neutrons
Francium has 87 protons and electrons; the number of neutrons is different for each isotope and francium has ca. 40 isotopes ad isomers. Number of neutrons = Atomic mass of the isotope - 87
32 protons, 32 electrons. Ge-72 isotope has 40 neutrons
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons
40 protons and 40 electrons.The most stable isotope of zirconium (Zr-91) has 51 protons.
K always has 19 protons, because that is what defines it as an element.40, the atomic mass is the sum of protons and neutrons. So if you subtract the number of protons from the atomic mass, you get the number of neutrons.40-19=21 neutrons
The isotope carbon-40 doesn't exist !
The number of protons is 30, the number of electrons is 28, the number of neutrons is different for each isotope.
Potassium (K ; Kalium) has Atomic No,. 19 in the Periodic Table. The '19' tells us that potassium has 19 protons , and 19 electrons. Potassium's atomic mass is '40' . This tells us the total number of nucleons in the nucleus of the atom. Nucleons is the collective noun for protons and neutrons. Since by the Atomic No. we know that there are 19 protons , then the number of neutrons is 40 - 19 = 21 neutrons. Since protons and neutrons are given an arbitrary value of '1' each, then '40' is the atomic mass of patassium. NB Some of your correspodents have stated that there is only 1 electron. This is completely wrong ; they have misunderstood. It has 19 electrons. Potassium , like sodium ; Same Group '1' elements), readily ionise ONE electron So the to form the ion K^(+). The other 18 electrons remains in the ion. Since there are 19 protons ( 19 (+) positives, there musr be 19 electrons (19(-) negatives) to maintain an uncharged atom . When one electron is ionised (lost) the atom becomes an ion and contains 19 (+) & 18(-) = 1(+) ; indicated as '+' So the atomic symbol is 'K' , but the ionic symbol is 'K^(+)'. K^(+) is a charged species , a cation. NOT an atom . NNB Potassium can exhibit ISOTOPES . This is where the number of NEUTRONS can vary. So the isotopes K-39 has 20 neutrons, 19 protons, 19 electrons K-40 has 21 neutrons , 19 protons, and 19 electrons K-41 has 22 neutrons , 19 protons and 19 electrons. However, as an example , an isotope of K-41 may ionise to K-41^(+) This ion would contain 22 neutrons, 19 protons, an 18 elecgtrons. Notice in ALL cases the number of protons does NOT change. A change in the number of protons means that it is a different element. Hope that helps!!!!
Francium has 87 protons and electrons; the number of neutrons is different for each isotope and francium has ca. 40 isotopes ad isomers. Number of neutrons = Atomic mass of the isotope - 87
The atomic number of potassium is 19. So there are 19 protons, 19 electrons. In K-40 isotope, there are 21 neutrons.
Argon has 18 protons, 18 electrons. The most stable isotope of argon (Ar-40) has 22 neutrons.
Francium has 87 protons and electrons; the number of neutrons is different for each isotope and francium has ca. 40 isotopes ad isomers. Number of neutrons = Atomic mass of the isotope - 87
Zirconium-90 (90Zr) has the atomic number 40, and it has 40 protons. The question asked about a specific isotope of zirconium, and the 90 in this isotope represents the number of protons plus the number of neutrons in 90Zr. The math is simple, and 90 minus 40 tells us there are 50 neutrons in this atom. As the atom was said to be electrically neutral, so that means the number of electrons will be equal to the number of protons. The atom will, therefore, have 40 electrons.