The elements with atomic numbers between 57 and 71 are called lanthanoids (or lanthanides).
The inner transitional metals contain 2 main groups, the lanthanide series, and the actinide series (f block elements). The lanthanide series include the 14 elements that proceed lanthanum (atomic number 57) from atomic numbers 58 to 71. Their electron configuration include the 4f and 5d energy levels. Because of the closeness of those two levels, there is considerable uncertainty in some electron configuration assignments. The actinide series include the 14 elements that proceed actinium (atomic number 89) from atomic numbers 90 to 103. The electron configurations of the actinides are even more uncertain than the lanthanides because the closeness of the energy levels and because the nuclei are unstable to radioactive decay. Only minute amounts of some elements are obtained because of their instability. All of the actinides are unstable with respect to alpha emission. The later members tend to undergo spontaneous fission, a fact which limits the number of elements possible.
Nickel (Ni) is a chemical element with the chemical symbol Ni and atomic number 28. Nickel has: protons=28 neutrons=30 electrons=28 atomic mass=58 atomic #=28
The atomic number of nickel (Ni) is 28. The atomic weight of Ni is 58.70 grams per mole. See the Web Links and the Related Questions to the left of this answer for a periodic table and more information about this element.
44 protons, element number = protons and electrons :)
Hot: 58 Celsius = 136.4 Fahrenheit.
The elements with atomic numbers 58 to 71 are called Lanthanides or Lanthanoids. This literally means "Like Lanthanum". They are called this because they have similar characteristics to Lanthanum.
Lantanyde and actinyde
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The elements beginning with Lanthanum (atomic number 57) and ending with Lutetium (atomic number 71) are called Lanthanides. They are also known as rare earth elements.
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The lanthanide series.
Elements 58 to 71 are called the Lanthanides.
The numbers that go into 58 evenly (with no remainder) are called the factors of 58.The only ones are: 1, 2, 29, and 58.
The lanthanide is the 14 elements with atomic number from 58 ( cerium , Ce ) to 71 ( lutetium , Lu ) . Because these elements are so similar in chemical and physical properties
The element is Cerium. It is in Lanthanide series. Mass number is 140.12