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

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

• Ar
• He
• Kr
• Rn

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

The atom with the largest atomic radius in Period 4 (row 4) is - 

• K
• Kr
• Fe
• Fe

Francium (Fr) has the lowest ionization energy in Group 1 because - 

• it has the smallest number of valence electrons
• it has the greatest atomic mass
• it has the greatest number of protons, so it attracts its electrons the strongest
• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The element with the smallest ionization energy in Period 6 is - 

• Rn
• Cs
• Os
• Tm

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the name of family I

• Alkaline Earth Metals
• Boron Family
• Alkali Metals
• Halogen Family

Families all have similar 

• Names
• atomic numbers
• atomic masses
• properties

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NGSS.HS-PS1-1

Which has the greater Electronegativity: 
N or C?

• C
• N

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

Tags

NGSS.HS-PS1-1