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Thorium, atom no. 90, just after Actinium (89)
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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
What is the first element of the actinides?
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.
What do metals include?
alkaline metals, alkaline earth metals, lanthanides and actinides and metals in mixed groups
What was the first of all the actinides?
Thorium (90)
Who named actinides as 'actinides'?
mosley
What is the first of the actinides?
Actinium Symbol: Ac Atomic Number: 89
What are hazards in actinides?
importance abuot actinides
What family is Americium in?
Americium is and actinide.
Are group 12 on the periodic table lanthandies or actinides?
No. There are two rows at the bottom of the periodic table. the first row elements are called lanthanides and the second row elements are called actinides.
What is second period at the bottom of the periodic table called?
The first period is at the top of the table. It consists of hydrogen and helium. The bottom period is period 7.
Are all atoms of actinides radioactive?
Yes. All of the actinides are radioactive.
What the characteristics of actinides?
actinides are the group of elements in the periodic table,see..........
Are halogens more reactive than actinides?
No actinides are more reactive
What are the characteristics of actinides?
actinides are the group of elements in the periodic table,see..........
Is a characteristic of the actinides?
All actinides are radioactive elements and some are man made.
