Not including the noble gases, which area of the periodic table has the highest electronegativities?

Chemistry

2 answers:

Anna71 [15]3 years ago

8 0

The answer is the upper right Fluorine is the most electronegative.

alekssr [168]3 years ago

3 0

Answer: Option (a) is the correct answer.

Explanation:

It is known that when we move across a period from left to right in a periodic table then there will be decrease in size of elements. This is because of addition of electrons into the same sub-shell.

Whereas when we move down a group then there occurs an increase in size of atoms due to addition of new sub-shells.

As electronegativity is the ability of an atom to attract an electron towards itself. Hence, smaller is the size of an atom more will be the ability of its nucleus to attract a proton towards itself. As a result, higher will be its electronegativity.

For example, fluorine is the most electronegative element present in the periodic table.

Thus, we can conclude that upper right area of the periodic table has the highest electronegativities.

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Which sample contains the largest number of oxygen atoms? Select one: a. 8.0 g of carbon dioxide b. 8.0 g of potassium chlorate

adell [148]

The sample with the largest number of oxygen atoms will be calcium perchlorate.

<h3>Number of atoms in a compound</h3>

Since we are not looking at the number of moles, the mass of the compounds has no bearing on the number of atoms of oxygen.

The chemical formula for carbon dioxide is $CO_2$ . Thus, it has 2 atoms of oxygen.
The chemical formula for potassium chlorate is $KClO_3$ . Thus, it has 3 oxygen atoms.
The chemical formula for calcium perchlorate is $Ca(ClO_4)_2$ . Thus, it has 8 atoms of oxygen.
The chemical formula for sodium hydroxide is NaOH. Thus, it has 1 atom of oxygen.