18 protons
18 electrons
22 neutrons
40 protons and 40 electrons.The most stable isotope of zirconium (Zr-91) has 51 protons.
32 protons, 32 electrons. Ge-72 isotope has 40 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
The atomic number of potassium is 19. So there are 19 protons, 19 electrons. In K-40 isotope, there are 21 neutrons.
There are 20 p , n , e- in an atom of calcium. Its atomic number is also 20.
A carbon-40 atom has 6 protons, 6 electrons, and 34 neutrons.
The number of protons is 30, the number of electrons is 28, the number of neutrons is different for each isotope.
40 protons and 40 electrons.The most stable isotope of zirconium (Zr-91) has 51 protons.
32 protons, 32 electrons. Ge-72 isotope has 40 neutrons
Potassium-40 (K-40) has 19 protons and 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
1) it's spelt Calcium and 2) 20 protons, 20 electrons, 20 neutrons
The atomic number of potassium is 19. So there are 19 protons, 19 electrons. In K-40 isotope, there are 21 neutrons.
Zinc has 30 protons 30 electrons and neutrons in variable numbers, depending on which isotope (% occurring in nature): 34 (48.9%), 36 (27.8%), 37 (4.1%), 38 (18.6%) or 40 (0.6%)
Argon has 18 protons, 18 electrons. The most stable isotope of argon (Ar-40) has 22 neutrons.
There are 20 p , n , e- in an atom of calcium. Its atomic number is also 20.
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons