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Section 1 Of Chapter 16 (Noble Gases (Halogens (This is group 17 halogens…
Section 1 Of Chapter 16
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Electron dot diagram: the symbol for element surrounded by as many dots as there are electrons in its outer energy level
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With periodic tables you can find the number of electrons in the atomic number above the symbol of the element
If you look at the periodic table, you can see that the elements are arranged in a specific order.
The number of electrons in a neutral atom of the element increases by one from left to right across a period .
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Noble Gases
At one time these elements were thought to be completely unreactive, and therefore became known as the insert gases
Halogens
This is group 17 halogens, a reactive type element in the periodic table