U3Q2 Ch. 5 Periodic Trends

What does electronegativity mean?

• ability to increase energy levels

• ability to react with elements

• ability to attract electrons

Tags

NGSS.HS-PS1-1

In the alkali metals, which element has a larger atomic radius?

• lithium, Li

• sodium, Na

• potassium, K

• cesium, Cs

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NGSS.HS-PS1-1

In the halogen family, which element is the most electronegative?

• iodine, I

• fluorine, F

• chlorine, Cl

• helium, He

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Looking at period 3, which element has the smallest atomic radius?

• Mg

• Cl

• Al

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NGSS.HS-PS1-1

How did Henry Mosely arrange the periodic table

• atomic number

• atomic mass

• number of electrons

• symbols

Which of the following are Cations?

• K⁺¹

• Sr

• K

• O^-2

• Br

Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

Tags

NGSS.HS-PS1-2

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

• Helium (He)
• Titanium (Ti)
• Calcium (Ca)
• Magnesium (Mg)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is larger

• Na

• Na+

Which is larger

• I

• I^-