Periodic Trends

Which has the greater EN: 
Cl or Al?

• Cl
• Al

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Which has the greater EN: 
N or C?

• C
• N

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Which has the greater EN: 
H or F?

• H
• F

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Which of the following will have a larger radius than Zinc?

• Gallium
• Aluminum
• Magnesium
• Strontium

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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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Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

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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 (and shielding takes place)

• The atoms have more energy levels (and shielding does not takes place)

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.

• the atoms have less mass

• the atoms acquire more protons causing the effective nuclear force to increase which pulls the electrons closer to the nucleus.

• the atoms have less electrons.

Atoms that have a high electronegativity, _______________.

• give up their electrons more easily.
• hold on to their electrons more tightly.
• have more electron shells.

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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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