Ionization Energy Trends

What is ionization energy?

• The energy needed to gain an electron.
• The amount of energy in a gaseous atom.
• The energy needed to lose an electron from a gaseous atom.
• The amount of energy needed to lose an electron.

Which element has the highest ionization energy?

• Sodium
• Magnesium
• Potassium
• Calcium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the trend of ionization energy?

• Decrease across a period, Increase down a group.
• Increase across a period, decrease down a group
• Increase across a period, decrease up a group.
• Decrease across a period, increase up a group.

What is the difference between the third and fourth ionization energies of any group 3 element?

• The fourth ionization energy level has four valence electrons.
• The third ionization energy level has less nuclear pull.
• There is no difference between the third and the fourth ionization energies.
• The fourth ionization energy level pulls at core electrons.

Tags

NGSS.HS-PS1-1

Which of the following list of elements is in descending order of ionization energy? 

• Mg, Na, Ca, K
• Na, K, Ca, Mg
• Mg, Ca, Na, K
• K, Ca, Mg, Na

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What factor makes removing a valence electron easier than a core electron?

• Nuclear Pull
• ZEFF
• Electron repulsion
• Electron shielding

Where do the exceptions of ionization energy occur?

• Groups 1, 2, & 7
• Groups 2, 3, 5,& 6
• Groups 3, 4, 6, & 7
• Groups 1, 4, 7, & 8

Given in terms of Coulomb's Law, how would the two ionization energies differ? F=(Q₁Q₂) / r²
F_orig= (4*6)/4²
F_new=(8*12)/8²

• They do not differ.
• The new ionization energy would be higher.
• The original ionization energy would be higher.

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NGSS.HS-PS2-4

How does atomic radius affect ionization energy?

• Atomic radius does not affect ionization energy.
• A smaller atomic radius means a higher ionization energy.
• A larger atomic radius means a higher ionization energy.
• A smaller atomic radius means a lower ionization energy.

Given the following ionization energies, what group is the element in?
580 kJ/mole
1,815 kJ/mole
2,740 kJ/mole
11,600 kJ/mole

• Group 1
• Group 2
• Group 3
• Group 4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2