Periodicity

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. 

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NGSS.HS-PS1-1

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

• increases, decreases

• increases, increases

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has the smallest atomic radius?

• Sulfur

• Chlorine

• Aluminum

• Sodium

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NGSS.HS-PS1-1

Which atom has the largest atomic radius?

• Potassium (K)

• Rubidium (Rb)

• Francium (Fr)

• Cesium (Cs)

Tags

NGSS.HS-PS1-1

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

• Carbon (C)

• Neon (Ne)

• Antimony (Sb)

• Germanium (Ge)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The element with the largest electronegativity in the halogens is - 

• At
• F
• Cl
• Br

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The element with the lowest electronegativity in Period 3 is -

• Na

• Cl

• Ar

• Mg

Tags

NGSS.HS-PS1-1

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

• increases

• decreases

Tags

NGSS.HS-PS1-1

Who developed the Periodic Table?

• Mendeleev, who was a chemist and teacher

• Pavlov, who was a teacher and physchologist

• Ladahoff, who was a teacher and biologist