The periodic table is divided into groups with the last number of the group coinciding with the number of electrons that an element in the group has in its outermost or valence shell.

Helium is in group 18 which means that it should have the same number of valence electrons as :

Neon
Argon
Krypton
Xenon and,
Radon

Yet Helium only has 2 valence electrons. We can therefore conclusively say that Helium does not have the same number of valence electrons as other elements in its group.

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3 years ago

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How did the magnet’s density measurement using the Archimedes’ Principle compare to the density measurement using the calculated

guapka [62]

Answer:

The two methods will yield different results as one is subject to experimental errors that us the Archimedes method of measurement, the the density measurement method will be more accurate

Explanation:

This is because the density method using the calculated volume will huve room for less errors that's occur in practical method i.e Archimedes method due to human error

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3 years ago

Two plastic balls suspended by strings are placed close to each other. If they have the same charge, how will they interact with

vampirchik [111]

Two plastic balls suspended by strings are placed close to each other. If they have the same charge then they will repel each other.

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Solid state has ____________ intermolecular force of attraction.

castortr0y [4]

solid state has the most intermolecular force of attraction.

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3 years ago