Atomic Radii

As you move down a group, atomic radius increases because - 

• you add more and more neutrons

• you add more and more protons

• you add more and more shells (energy levels)

• you add more atomic mass

Which of the following elements has the largest atomic radius?

• Li

• Na

• K

• Rb

As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 

• the number of protons increases, so attraction to electrons increases

• the number of energy levels increases

• the number of electrons increases

• the atomic mass increases

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NGSS.HS-PS1-1

Atomic Radius really refers to ...

• 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

Order the following in increasing atomic radii: 
Fe, K, Br, Ca, As

• Br

• As

• Fe

• Ca

• K

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NGSS.HS-PS1-1

The atom with the largest atomic radius in Group 18 is - 

• Ar

• He

• Kr

• Rn

Of the elements Ca, Be, Ba, and Sr, which has the largest atomic radius?

• Be

• Ba

• Ca

• Sr

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NGSS.HS-PS1-1

Which of the following elements is expected to have the largest atomic radius?

• Ca

• Rb

• K

• I

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NGSS.HS-PS1-1

As you move down a group in the periodic table, atomic size generally __________.

• increases

• decreases

• varies randomly

• remains the same

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Which of the following correctly lists the elements Ba, Ca, Mg, Sr and Be in increasing order of their atomic radii? with 1 being the smallest atom

• Be

• Mg

• Ca

• Sr

• Ba

Tags

NGSS.HS-PS1-1