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Periodic Table has 18 groups; see the link below.

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Q: What are the three element groups called?
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What are element groups 1 and 7 called?

Element group 1 is called the alkali metals, while element group 7 is called the halogens.


What is the law of traid?

A German chemist Dobernier observed relationship between atomic masses of several groups of three elements called traids.In these groups the central or middle element had atomic mass average to the other two elements.


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The columns on the periodic table are called Groups.


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Scalene, Isosceles and Equilateral.


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It is an old name, a synonym; groups of elemetes were compared with a family.


What element of art refers to an object that has three dimensions?

it is called a form


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This element 53 is called: Iodine, diatomic element I2.


What elements are not transition elements?

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How do element's groups run and how do element's periods run?

groups run top to bottom periods run left to right