Electronegativity Trends

As you move across a period, the outer electrons are ________ to the nucleus, so the nucleus of the atom is ________ to attract electrons in a bond.

• closer, more able

• closer, less able

• further, less able

• further, more able

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What is the trend for electronegativity as you move left to right across a period and why?

• EN increases because the shielding effect increases causing the effective nuclear charge to decrease as you add more protons to the nucleus

• EN decreases because the shielding effect decreases causing the effective nuclear charge to increase as you add more protons to the nucleus

• EN increases because the effective nuclear charge increases as you add protons to the nucleus and increase the number of valence electrons in the outer shell

• EN decreases because the effective nuclear charge decreases as you reduce the number of protons in the nucleus and increase the number of valence electrons in the outer shell

Tags

NGSS.HS-PS1-1

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What is the trend for EN as you move down a group or family and why?

• EN increases because the number of energy levels decrease causing an increase in the shielding effect and a decrease in the effective nuclear charge.

• EN decreases because the number of energy levels increases causing an increase in the shielding effect and a decrease in the effective nuclear charge

• EN increases because the number of energy levels increases causing a decrease in the shielding effect and an increase in the effective nuclear charge

• EN decreases because the number of energy levels decrease causing a decrease in the shielding effect and a decrease in the effective nuclear charge.

Tags

NGSS.HS-PS1-1

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Arrange the following elements in order by increasing electronegativity - Sn, Sr, I, Ag, Zr

• Sr, Zr, Ag, Sn, I

• Sr, Ag, Zr, I, Sn

• I, Sn, Ag, Zr, Sr

• Sn, I, Zr, Ag, Sr

Tags

NGSS.HS-PS1-1

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What has the greatest effect on electronegativity as you move across a period? (check all that are correct)

• shielding effect

• effective nuclear charge

• number of neutrons

• number of protons

• number of energy levels

Tags

NGSS.HS-PS1-1

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Which element has the greatest electronegativity?

• Si

• S

• Ar

• Na

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Which element has the lowest electronegativity?

• Sr

• Mg

• Ra

• Ca

Which element has an electronegativity of 4.0, the highest of all elements?

• H

• Fr

• He

• F

Put these in increasing order in terms of electronegativity :

• B < N < F

• B < F < N

• N < F < B

• F < N < B

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NGSS.HS-PS1-2

What idea is this cartoon showing?

• chlorine is more electronegative than hydrogen

• chlorine has more energy levels than hydrogen

• hydrogen is more electronegative than chlorine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2