Periodic trends 2

Which element in Period 2 has the greatest atomic radius?

• Be

• C

• Na

• Li

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Which of the group 13 elements is the largest?

• B

• Ti

• Fr

• Ga

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Of the halogens, which has the smallest radius?

• F

• Br

• He

• At

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Of the halogens, which has the smallest electronegativity?

• F

• Cl

• At

• Ne

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Which of the alkaline-earth metals has the smallest electronegativity

• Be

• Sc

• Ra

• Sr

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Which alkali metal is the least reactive?

• Li

• Na

• H

• Fr

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Which of the period 3 elements has the largest electronegativity?

• Ar

• Cl

• Na

• F

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Atomic Radius is...

• the relative size of the atom's nucleus
• the relative size of the atom's electron cloud
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

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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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 have more protons.
• the atoms have less electrons.

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