Electronegativity in Chemistry

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Why does electronegativity decrease down a group on the periodic table?

The radioactive nature of elements in period 7.

The gain of electrons that occupy energy shells closer to the nucleus.

The full outer shells of noble gases.

The presence of more electron shells between the nucleus and the outermost electrons. (correct)

How does the number of electron shells affect nuclear shielding?

More electron shells increase shielding. (correct)

More electron shells result in decreased shielding.

Fewer electron shells increase shielding.

Fewer electron shells have no effect on shielding.

Why do noble gases have electronegativity values of 0.0?

Because they are in period 7 of the periodic table.

Due to the presence of radioactive isotopes.

Because they have full outer shells of electrons. (correct)

Because they have a high number of valence electrons.

In what scenario are nonpolar molecules formed?

When carbon bonds with hydrogen. Signup and view all the answers

How is the polarity of the amide group utilized in drug manufacturing?

To make drugs soluble and more effective. Signup and view all the answers

Why do elements with atomic numbers greater than 104 have electronegativity values of 0.0?

Because their nucleus is unstable and breaks down. Signup and view all the answers

What effect does having more electron shells between the nucleus and outermost electrons have on electronegativity?

It decreases electronegativity. Signup and view all the answers

Why do Francium's outermost electrons get easily pulled away from its nucleus?

Due to the low number of electron shells between the nucleus and outermost electrons. Signup and view all the answers

What is the reason behind nonpolar and polar substances not mixing well?

Their different polarities make them repel each other. Signup and view all the answers

What factor contributes to the low or nonexistent level of nuclear shielding in an atom?

The presence of more electron shells between the nucleus and the outer shell electrons Signup and view all the answers

Which element is likely to have the lowest electronegativity value?

Francium Signup and view all the answers

Why do noble gases typically have an electronegativity value of 0.0?

Their atoms have full outer electron shells Signup and view all the answers

What characteristic makes molecules with a C-H bond nonpolar?

Similar electronegativities of carbon and hydrogen Signup and view all the answers

What effect does moving down a group on the periodic table have on the electronegativity of elements?

Decreases electronegativity Signup and view all the answers

Which atoms bond together to form an amide bond that joins amino acids in proteins?

Carbon and nitrogen Signup and view all the answers

Electronegativity in Chemistry

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