8.0 Atomic Structure

The element with the lowest electronegativity in Period 3 is - 

• Na
• Cl
• Ar
• Mg

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What is ionization energy?

• Energy needed to destroy an atom
• Energy required to remove an electron
• Energy needed to split an electron
• Energy required to add an electron

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As you look from left to right across a period, ionization energy and electronegativity both

• increase

• decrease

Which element has the greater ionization energy?

• Magnesium (Mg)

• Phosphorus (P)

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Who developed the Periodic Table?

• Mendeleev, who was a chemist and teacher

• Pavlov, who was a teacher and physchologist

• Ladahoff, who was a teacher and biologist

How many peaks would be expected for a PES spectum for Calcium?

• 2

• 3

• 4

• 5

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The PES spectrum below is for the element _______________.

• O

• Ne

• N

• F

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What does the 4th peak from the left represent?

• The 2s electrons

• The 3d electrons

• The 2p electrons

• The 3s electrons

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Which element has the electron configuration 1s²2s²2p⁶3s²3p⁵?

• chlorine

• fluorine

• sulfur

• phosphorus

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What is the electron configuration for this PES graph?

• 1s²2s²2p⁶3s²3p²

• 1s²2s²2p⁶3s²3p¹

• 1s²2s²2p⁶3s²3p³

• 1s²2s²2p⁶3s²

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