Atomic Radius, Ionization Energy

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

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

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.

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NGSS.HS-PS1-1

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

• Ar
• He
• Kr
• Rn

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NGSS.HS-PS1-1

Which statement correctly and completely identifies a trend?

• Atomic radius decreases across a period and increases down a group.

• Electronegativity decreases across a period and decreases down a group.

• Ionization energy increases across a period and increases down a group.

• Ionic radius increases across a period and increases down a group.

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NGSS.HS-PS1-1

Which periodic group has the smallest atomic radius?

• Alkali metals (Group 1)

• Halogens (Group 17)

• Noble Gases (Group 18)

• Transition metals (middle of table)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Order the following in increasing atomic radii: 
Ra, Be, Ca, Rb, H

• Ra, Be, Rb, H, Ca
• Rb, H, Ca, Be, Ra
• Ra, Rb, Ca, Be, H
• H, Be, Ca, Rb, Ra

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NGSS.HS-PS1-1

The more protons there are, the  ____ .

• Weaker the pull by the protons

• Smaller the electrons
• Stronger the pull by the protons

• The bigger the electrons

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NGSS.HS-PS1-3

Which one has the largest radius?

• Lithium (Li, atomic #3)
• Boron (B, atomic #5)
• Neon (Ne, atomic #10)
• Nitrogen (N, atomic #7)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has the smallest atomic radius: Li, O, C, F?

• Li
• O
• C
• F

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• Be
• Ba
• Ca
• Sr

Tags

NGSS.HS-PS1-1