Why are all members of the same family on the periodic table likely to react in the same way and with the same elements?

Answer 1

It just is.

Each element has a shells. One way that they are alike and has the same properties is because they have the same needs to fulfill their complete shell. Just like elements in the 7th family. They all desperately need that one extra element to feel satisfied. Just like elements in the 1st family desperately need to get rid of that single electron to complete their shell.

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Answer 2

Caleb Adams

Since the number of valence electrons in an element determines its reactivity and interactions with other elements, all members of the same family on the periodic table have similar chemical properties.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.