Atomic Structure and Periodic Trends

Which of the following elements has the highest electronegativity?

• Sodium (Na)

• Chlorine (Cl)

• Aluminum (Al)

• Magnesium (Mg)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Describe the trend in atomic radius as you move down a group in the periodic table.

• It increases

• It decreases

• It remains constant

• It first increases, then decreases

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NGSS.HS-PS1-1

Which of the following elements is most likely to form a +1 ion?

• Oxygen (O)

• Potassium (K)

• Calcium (Ca)

• Sulfur (S)

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NGSS.HS-PS1-1

Explain why noble gases are generally unreactive.

• They have a full outer electron shell

• They have high electronegativity

• They have low ionization energy

• They have incomplete electron shells

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements is an isotope of Carbon-12?

• Carbon-14

• Nitrogen-14

• Oxygen-16

• Helium-4

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NGSS.HS-PS1-8

• :Cl:

• :Cl: with 8 dots

• :Cl: with 6 dots

• :Cl: with 7 dots

Compare the reactivity of alkali metals as you move down the group.

• Reactivity decreases

• Reactivity increases

• Reactivity remains constant

• Reactivity first decreases, then increases

Which of the following statements best explains why fluorine is more reactive than chlorine?

• Fluorine has a higher atomic number

• Fluorine has a smaller atomic radius

• Fluorine has more protons

• Fluorine has a lower electronegativity

Tags

NGSS.HS-PS1-2

Identify the group in the periodic table that contains elements with a full outer shell of electrons.

• Alkali metals

• Halogens

• Noble gases

• Transition metals

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NGSS.HS-PS1-1