Periodicity

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

Electronegativity is...

• how good an atom is at attracting electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

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Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases 
• increases, increases
• increases, decreases 
• stays the same, increases

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List the following in order of weakest to strongest ionization energy.
P, Cs, Co, Sr

• P, Co, Sr, Cs
• Cs, Sr, Co, P
• Sr, Cs, Co, P
• P, Co, Cs, Sr

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Which of the following elements has the smallest atomic radius?

• Sulfur

• Chlorine

• Aluminum

• Sodium

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Which atom has the largest atomic radius?

• potassium

• rubidium

• francium

• cesium

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Which of the following will have a higher electronegativity than arsenic (As)?

• Carbon (C)

• Neon (Ne)

• Antimony (Sb)

• Germanium (Ge)

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Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (He)

• Titanium (Ti)

• Calcium (Ca)

• Magnesium (Mg)

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The element with the largest electronegativity in the halogens is - 

• At
• F
• Cl
• Br

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The element with the lowest electronegativity in Period 3 is -

• Na

• Cl

• Ar

• Mg

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