Periodic Trends for Atomic and Ionic Radius

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 neutrons

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NGSS.HS-PS1-1

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

• The atoms have more mass

• The atoms have more protons

• The atoms have less mass

• The atoms have less electrons

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Which one is more larger? Ca or Ca²⁺

• Ca

• Both are same size

• Ca²⁺

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Which one is smaller? P or P^3-

• P

• Both are same size

• P^3-

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NGSS.HS-PS1-1

The term that is related to the number of proton is

• Ionization Energy

• Nuclear charge

• Electronegativity

• Shielding effect

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Atomic radius generally increases as we move _______

• down a group and from right to left across a period

• down a group and from left to right across a period

• up a group and from left to right across a period

• up a group and from right to left across a period

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NGSS.HS-PS1-1

Which atom has the largest atomic radius?

• Potassium

• Francium

• Rubidium

• Cesium

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As you move from left to right on the periodic table, the number of valence electrons _______

• Increases

• Remains the same

• Decreases

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NGSS.HS-PS1-2

As you move down a group on the periodic table, the number of valence electrons ________

• Increases

• Remains the same

• Decreases

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is TRUE on atomic radius?

• The radius is mainly due to how large an atom's nucleus

• The atomic radius is a way we measure the mass of an atom

• The radius is mainly due to the size of the electron cloud

• Neutrons account for the majority of an atom's radius