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Why are the atomic radii of lanthanum and its following elements in the same period almost the same?
For the Lanthanide series electrons, which IF they are in an outer orbital may make a difference in atomic size. But these electrons are not added to the outer shell, nor to the next to last energy level, but are being added 2 levels inward, They just add more to the shielding effect not allowing the nucleuc to have a stronger attraction for the outer electrons. Thus not much effect on size.
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What series are called elements 57 to 70?
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
What are the 2 words that describe the classification of the 17 chemical elements with the numbers 57-71?
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
What is the actinide with the smallest atomic number?
The lantanides (6f-block elements) start, after 57Lantanium, with atom number 58, Ce, to end with 71Lu
What are elements with atomic numbers 57-70 called?
Elements with atomic numbers 57-70 are known as the lanthanides, which are a series of 15 chemical elements in the periodic table. They include elements from lanthanum (La, atomic number 57) to lutetium (Lu, atomic number 71). These elements are known for their similar properties and are often found in minerals and used in various applications, including electronics and strong permanent magnets.
How many neutrons down lanthanum-141 have in its nucleus?
Lanthanum's atomic number is 57 thus it has 57 protons, the number of protons an atom has is equal to the atomic weight, in this case 141 minus the number of protons or 57 so, 141-57=84 Lanthanum-141 has 84 neutrons.
What series are called elements 57 to 70?
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
What is the atomic number of lanthanum?
Lanthanum, with the chemical symbol La, is the chemical element with the atomic number 57.
What are the 2 words that describe the classification of the 17 chemical elements with the numbers 57-71?
Elements from atomic number 57 (Lanthanum) to 71 (Lutetium) are called the Lanthanides. Lanthanide means "like Lanthanum" and so, the Lanthanides are based on Lanthanum. Only one of the Lanthanides is radioactive: Promethium (Pm - No. 61)
What is the atomic number of the element lanthanum on the periodic table?
The atomic number of the element lanthanum on the periodic table is 57.
What is lanthanum's atomic radius?
187 picometers.
What is lanthanum atomic mass?
Im not sure about the atomic mass bit but Lanthanum is a silvery white, malleable, ductile, and soft rare-earth metal xx
What is the actinide with the smallest atomic number?
The lantanides (6f-block elements) start, after 57Lantanium, with atom number 58, Ce, to end with 71Lu
What is the atomic mass of the element Lanthanum?
138.90547 amu
What are elements with atomic numbers 57-70 called?
Elements with atomic numbers 57-70 are known as the lanthanides, which are a series of 15 chemical elements in the periodic table. They include elements from lanthanum (La, atomic number 57) to lutetium (Lu, atomic number 71). These elements are known for their similar properties and are often found in minerals and used in various applications, including electronics and strong permanent magnets.
How many neutrons down lanthanum-141 have in its nucleus?
Lanthanum's atomic number is 57 thus it has 57 protons, the number of protons an atom has is equal to the atomic weight, in this case 141 minus the number of protons or 57 so, 141-57=84 Lanthanum-141 has 84 neutrons.
What are the atomic numbers from 58 to 71 called?
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.
Is uranium a lanthanum series element?
The chemical element with atomic number 57 is Lanthanum (La). It is a Lanthanide, as it is what the rest of the Lanthanides are based on. It has 57 electrons in 6 shells. It is naturally occuring and non-radioactive.
