The actinide series
The inner transition metals are a section that has been pulled out of the periodic table. These elements are called Lanthanides (La) & Actinides (Ac). Lanthanides: Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb & Lu Actinides: Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Pu, and Lr.
The metal that melts at 90 degrees Celsius is gallium.
One atom of Strontium-90 contains 38 electrons.
The elements with atomic numbers 58-71 are called lanthanides, and those with atomic numbers 90-103 are called actinides. These elements are part of the inner transition metals and have unique properties due to their electron configurations.
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.
Thorium is a metal element. There are 90 electrons in a single atom.
The inner transition metals are a section that has been pulled out of the periodic table. These elements are called Lanthanides (La) & Actinides (Ac). Lanthanides: Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb & Lu Actinides: Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Pu, and Lr.
A transition element of f-block Thorium has 90 electrons in natural state, it is a Radioactive element.
90 in ground state
Thorium 230 has 90 protons and 140 neutrons - the difference is 50.
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 230 has 90 electrons and 140 neutrons.
Thorium has 90 electrons.
Thorium has 90 electrons.
The metal that melts at 90 degrees Celsius is gallium.
One atom of Strontium-90 contains 38 electrons.
The elements with atomic numbers 58-71 are called lanthanides, and those with atomic numbers 90-103 are called actinides. These elements are part of the inner transition metals and have unique properties due to their electron configurations.