Trends For Electronegativity and Reactivity

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

NGSS.HS-PS1-2

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.

Which element has the greatest electronegativity?

• Si

• S

• Ar

• Na

Tags

NGSS.HS-PS1-2

Which element has the lowest electronegativity?

• Sr

• Mg

• Ra

• Ca

Tags

NGSS.HS-PS1-1

Which element has the least effective nuclear charge?

• N

• F

• Li

• Be

Tags

NGSS.HS-PS1-1

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

The trend for reactivity for metals is that the reactivity _______ as you go across the period and it _________ as you move down a group.

• increases, increases

• decreases, decreases

• does not change, decreases

• decreases, increases

The trend for reactivity for nonmetals is that as you move across from left the right reactivity __________(except for noble gases) and as you move down a group the reactivity _________

• increases, increases

• decreases, decreases

• decreases, increases

• increases, decreases

Which of the following nonmetals are the most reactive?

• Ge

• Kr

• Se

• Br

Which of the following nonmetals are the most reactive?

• Po

• S

• Se

• O

Tags

NGSS.HS-PS1-2