Periodicty

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

Electronegativity is...

• how good an atom is at attracting electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases 
• increases, increases
• increases, decreases 
• stays the same, increases

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Which atom has the largest atomic radius?

• potassium (₁₉K)

• rubidium (₃₇Rb)

• francium (₈₇Fr)

• cesium (₅₅Cs)

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Which of the following elements has the smallest atomic radius?

• Sulfur (₁₆S)

• Chlorine (₁₇Cl)

• Aluminum (₁₃Al)

• Sodium (₁₁Na)

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Which of the following will have a higher electronegativity than arsenic (As)?

• Carbon (₆C)

• Neon (₁₀Ne)

• Antimony (₅₁Sb)

• Germanium (₃₂Ge)

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Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (₂He)

• Titanium (₂₂Ti)

• Calcium (₂₀Ca)

• Magnesium (₁₂Mg)

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The element with the largest electronegativity in the halogens is -

• ₈₅At

• ₉F

• ₁₇Cl

• ₃₅Br

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As you look from left to right across a period, electronegativity

• increases

• decreases

Atomic radius generally increases as we move __________.  

• down a group and from right to left across a period 
• up a group and from left to right across a period 
• down a group and from left to right across a period 
• up a group and from right to left across a period 

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NGSS.HS-PS1-1