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Actinides or actinoids are the elements in the Periodic Table having general electronic configuration of 5f 0-146d0-17s2. they are also called 5f- series. the atomic numbers are:
90 - Thorium (Th)
91 - Protactinium (Pa)
92 - Uranium (U)
93 - Neptunium (Np)
94 - Plutonium (Pu)
95 - Americium (Am)
96 - Curium ( Cm)
97 - Berkelium (Bk)
98 - Californium (Cf)
99 - Einsteinium (Es)
100 - Fermium (Fm)
101 - Mendelevium ( Md)
102 - Nobelium ( No)
103 - Lawrencium (Lr)
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoLanthanides go from atomic number 57 all the way up to 71.
Wiki User
∙ 11y agoWiki User
∙ 13y agoLanthanide series comprises of elements with atomic no. from 58-71.
So, it has 14 elements
Wiki User
∙ 15y agoRare earth
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How many columns of elements does the periodic table have?
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
How many elements are there in the actinoid series?
14 elements.
Which lanthanide element and which transition element have only radioactive isotopes?
All or almost all elements have radioactive isotopes if artificial isotopes are included. Among the naturally occurring elements, uranium, polonium, radium, and thorium have naturally occurring radioactive isotopes on earth.
How many elements make up beryllium sulfite?
5
How many different elements make up H3PO4?
3
How many elments are in the lanthanide series?
15
How many columns of elements does the periodic table have?
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
How many rows are on the periodic table?
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
Elements 58 though 71 and 90 through 103 are called?
58 through 71 are lanthanides, 90 through 103 are actinides.
How many elements are in the lanthanide series?
It depends on the periodic table. Some have 14 lanthanides and some have 15 lanthanides. Refer to the related link for a Wikipedia article on the lanthanides for more information.
How many groups of elements we're formed?
5 groups of elements
How many elements are there in the actinoid series?
14 elements.
How many electrons would the above atom have in the outer electron shell?
Somewhere between 1 & 8 (unless ionised - could have 0). Which atom are we talking about here? Rule of thumb (not including Lanthanide & Actanide series) - Find which column it is in on the periodic table of elements and that's how many electrons it will have in it's (non-ionised) state.
Which lanthanide element and which transition element have only radioactive isotopes?
All or almost all elements have radioactive isotopes if artificial isotopes are included. Among the naturally occurring elements, uranium, polonium, radium, and thorium have naturally occurring radioactive isotopes on earth.
How many different elements appear in the uranium-238 decay series?
20 isotopes
How many elements make landforms?
88 different elements exist in nature.
Do scientists have to know all the chemical elements in the periodic table?
No. Firstly not all scientists are chemists. Secondly, not all chemists are working on problems that involve many of the elements. In fact only a small minority of working chemists could name the 15 lanthanide or rare earth elements. Thirdly, all chemists work with computer terminals or reference books nearby where they can easily look up rare or unfamiliar elements.
