Introduction to Periodic Table Trends

What is atomic radius?

• The number of protons in an atom

• The amount of energy needed to remove an electron from an atom

• The size of the atom

• The measure of an atom's attraction to electrons

What happens to the atomic radius as you go from top to bottom within a group in the periodic table?

• It remains constant

• It decreases

• It increases

• It fluctuates randomly

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As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

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What happens to the atomic radius as you go from left to right within a period in the periodic table?

• It fluctuates randomly

• It increases

• It remains constant

• It decreases

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Atomic radius decreases from left to right across a period because from left to right there is

• increasing number of valence electrons

• increasing shielding

• increasing effective nuclear charge (from increasing protons in the nucleus)

• increasing number of electron shells

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Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

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What is ionization energy?

• The measure of an atom's attraction to electrons

• The number of protons in an atom

• The amount of energy needed to remove an electron from an atom

• The size of the atom

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How does ionization energy change from left to right within a period in the periodic table?

• It fluctuates randomly

• It increases

• It decreases

• It remains constant

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How does ionization energy change from top to bottom in a group in the periodic table?

• It remains constant

• It decreases

• It increases

• It fluctuates randomly

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If an electron is closer to the nucleus, it will be (harder, easier) to remove that electron and its ionization energy will be (high, low )

• Easier, High

• Easier, Low

• Harder, High

• Harder, Low