Periodic Trends Atomic Radius

As you move across a row on the periodic table, what generally happens to the atomic radius?

• it decreases

• it increases

• it stays the same

What property is being measured in this diagram?

• Density

• Ionization Energy

• Atomic Radius

• Atomic Mass

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NGSS.HS-PS1-3

Which of the following atoms has the greatest atomic radius?

• nitrogen

• phosphorus

• potassium

• cesium

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

• Gallium

• Aluminum

• Magnesium

• Strontium

Which of the following is NOT a trend that varies periodically in the periodic table?

• Electronegativity

• Ionization energy

• Symbols of elements

• Atomic radius

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the alkali metals, which element has a larger atomic radius?

• lithium, Li

• sodium, Na

• potassium, K

• cesium, Cs

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NGSS.HS-PS1-1

Looking at period 3, which element has the smallest atomic radius?

• Mg

• Cl

• Al

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NGSS.HS-PS1-1

In group 2, which of these elements has the largest atomic radius?

• Ba

• Mg

• Ca

• La

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NGSS.HS-PS1-1

Which of these halogens has the largest atomic radius?

• fluorine, F

• chlorine, Cl

• bromine, Br

• iodine, I

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NGSS.HS-PS1-1

As you move down a group on the periodic table, what generally happens to the atomic radius?

• A) it decreases

• B) it increases

• C) it stays the same

• D) it fluctuates