Thorium (Th).
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.
One atom of Strontium-90 contains 38 electrons.
Thorium (Th) is an inner transition metal with 90 electrons. It is a radioactive element that belongs to the actinide series of the periodic table.
Thorium, or Th, has an atomic number of 90. That means that every atom of thorium has 90 protons. The only naturally abundant isotope of thorium is 232Th, and so therefore it has 232 - 90 = 142 neutrons.
Elements are matter made of one kind of atom.elements
Thorium is a metal element. There are 90 electrons in a single atom.
Thorium's atomic number is 90. Thus, thorium has 90 protons per atom. To be electrically neutral then, thorium must also have 90 electrons per atom.
Thorium has 90 protons. So for a neutral atom, there has to be 90 electrons. 230 is the total number of nucleons. ie 90 protons and 140 neutrons.
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.
One atom of Strontium-90 contains 38 electrons.
Thorium 230 has 90 protons and 140 neutrons - the difference is 50.
Thorium has 90 electrons.
Thorium has 90 electrons.
Atomic number gives the number of protons: 40. If the atom is neutral, it must have an equal number of protons and electrons. Therefore, the number of electrons is also 40. The isotope number is the same thing as the atomic mass. Atomic mass is basically the sum of protons and neutrons. Therefore, subtracting the number of protons from the atomic mass yields the number of neutrons: (90 - 40 = 50). Thus, there are 50 neutrons.
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.
Atoms that are neutrally charged will have the same number of protons as electrons, because one proton will cancel out one electron. To achieve a net charge of 0, 12 protons must be countered with 12 electrons.
The atom with 38 protons, 50 neutrons, and 36 electrons is Strontium (Sr), as the number of protons determines the element. It belongs to the alkali earth metal group and is commonly used in fireworks and flares to produce a bright red color.