Atomic 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 nuetrons

Which atom is bigger?

• H

• Li

Which atom is bigger?

• F

• Cl

• Br

Which atom is bigger?

• Li

• K

• Fr

Which of the following elements would be larger: potassium (K) or cesium (Cs)?

• potassium

• cesium

• both atoms are the same size

• cannot be determined

• the sizes can vary

Answer explanation

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NGSS.HS-PS1-1

The more protons there are, the  ____ .

• Weaker the pull

• Smaller the electrons

• Stronger the pull

• The bigger the electrons

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NGSS.HS-PS1-3

Which atom has the largest atomic radius?

• potassium

• rubidium

• francium

• cesium

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NGSS.HS-PS1-1

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

• Gallium

• Aluminum

• Magnesium

• Strontium

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which periodic group has the smallest atomic radius?

• Alkali metals

• Halogens

• Noble Gases

• Transition metals

As you move across a period from left to right, the atomic radius generally:

• Increases

• Decreases

• Remains the same

• Varies unpredictably

Tags

NGSS.HS-PS1-1