Atomic Radius Trend

What trend in atomic radius occurs as you move from left to right across a period in the periodic table?

• The atomic radius increases because the nuclear charge decreases

• The atomic radius decreases because the nuclear charge increases

• The atomic radius remains constant because the number of energy levels remains the same

• The atomic radius increases because the number of neutrons increases

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NGSS.HS-PS1-1

How does the atomic radius change as you move down a group in the periodic table?

• It decreases because the number of energy levels increases

• It increases because the number of energy levels increases

• It remains constant because the number of protons changes

• It decreases because the atomic number increases

Why does Fluorine (F) have a smaller atomic radius than Lithium (Li)?

• Because Fluorine has fewer protons than Lithium

• Because Fluorine has more energy levels than Lithium

• Because Fluorine has a higher nuclear charge, pulling electrons closer

• Because Lithium is a gas at room temperature

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the primary reason atomic radius increases down a group in the periodic table?

• Increase in nuclear charge

• Decrease in electron shielding

• Increase in electron shielding

• Decrease in nuclear charge

As you move across a period from left to right in the periodic table, what happens to the atomic radius?

• It increases

• It decreases

• It remains the same

• It fluctuates

Indicate whether the following properties increases or decreases from left to right across the periodic table.

Atomic Radius(excluding noble gases)

• Increases

• Decreases

Analyze the factors that contribute to the increase in atomic radius as you move down a group.

• Increased nuclear charge and decreased shielding

• Increased number of electron shells and increased shielding

• Decreased nuclear charge and increased electron affinity

• Decreased number of electron shells and decreased shielding

The atomic radius gets ​​ (a)   as you go down a group in the periodic table. This is caused by the addition of​​ ​ (b)   outweighs the nucleus' force of ​ ​​ (c)   ​​

• larger

• energy levels

• attraction

• remains the same

• smaller

Tags

NGSS.HS-PS1-1

Predict the element with the smallest atomic radius in the third period.

• Sodium (Na)

• Magnesium (Mg)

• Aluminum (Al)

• Chlorine (Cl)

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NGSS.HS-PS1-1

Which of the following elements has the largest atomic radius?

• Carbon (C)

• Oxygen (O)

• Nitrogen (N)

• Boron (B)