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The first element in the actinide series is actinium , a chemical element in the Periodic Table that has the symbol Ac and atomic number 89.
The actinide (or actinoid) series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table , with atomic numbers 89-103.
The actinides get their name from the first element in the series , actinium.
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∙ 15y ago
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∙ 12y agothorium. the first is actinium (atomic number 89), and the second is thorium (atomic number 90)
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∙ 13y agoThe element is Thorium (Th) with the atomic number 90.
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∙ 10y agoNeptunium
Neptunium
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∙ 12y agoNeptunium(Np)
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∙ 13y agoActinium (Ac)
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∙ 12y agoThorium
Khadija Bibi
Fourth halogen
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The first of the actinides?
Thorium, atom no. 90, just after Actinium (89)
Family members for the element thorium?
Thorium belongs to the actinides family that is found in row 7 of the periodic table. There are 15 elements in this family, including actinium, uranium, plutonium, neptunium, and lawrencium.
Which two actinides occur naturally?
Uranium and Plutonium are the only elements from the Actinides series that occur naturally on Earth, though they are rare.
What is the group number of neptunium?
Neptunium is a member of the actinides group.
What are Lanthanides and Actinides?
Elements. The Lanthanides are: Atomic No.575859606162636465666768697071NameLaCePrNdPmSmEuGdTbDyHoErTmYbLu The Actinides are:Atomic No.8990919293949596979899100101102103NameAcThPaUNpPuAmCmBkCfEsFmMdNoLr
The lanthanides and actinides are known as?
Element groups
What element is the second member of the actinides?
Thorium
What scientific family is the element mendelevium in?
Actinides family
What family does element uranium belong to?
The Actinides(Actinoids)
Does einsteinium have an element like it?
The other elements of the actinides group.
What element does plutonium belong to?
Plutonium is a member of the actinides group.
What is americium element family?
Americium is a member of the actinides group.
Is americium a rare element series?
Americium is a member of the actinides group.
What elements on the periodic table is a radioactive element?
Lanthanides and Actinides probably
What element family does Actiniumbelong to?
Actinium belongs to actinides. It has atomic no. 89
What family does the element mendelevium belong to?
it is transition metal. ---- Actinides family
What type of element is curium?
Curium is an artificial element, radioactive, unstable, metal , solid, a member of the actinides group.
