Atomic Radius, Electronegativity and Ionization Trends

Which of the following atoms has the largest atomic radius?

• Na

• K

• Mg

• Ca

Which element is a member of the halogen family?

• K

• B

• I

• S

Which general trend is found in Period 2 on the Periodic Table as the elements are considered in order of increasing atomic number?

• decreasing atomic mass

• increasing first ionization energy

• increasing atomic radius

• decreasing electronegativity

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which represents the electron configuration of a metalloid in the ground state?

• 2-3

• 2-5

• 2-8-5

• 2-8-6

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NGSS.HS-PS1-1

Which general trends in atomic radius and electronegativity are observed as the elements in Period 3 are considered in order of increasing atomic number?

• Atomic radius decreases and electronegativity increases.

• Atomic radius increases and electronegativity decreases.

• Both atomic radius and electronegativity increase.

• Both atomic radius and electronegativity decrease.

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NGSS.HS-PS1-1

Which list of elements contains a metal, a metalloid, a nonmetal, and a noble gas?

• Be, Si, Cl, Kr

• C, N, Ne, Ar

• K, Fe, B, F

• Na, Zn, As, Sb

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NGSS.HS-PS1-1

The elements on the Periodic Table of the Elements are arranged in order of increasing

• atomic mass

• formula mass

• atomic number

• oxidation number

Compared to the atoms of nonmetals in Period 3, the atoms of metals in Period 3 have

• fewer valence electrons

• more valence electrons

• fewer electron shells

• more electron shells

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NGSS.HS-PS1-1

Which list of elements is arranged in order of increasing electronegativity?

• Be, Mg, Ca

• F, Cl, Br

• K, Ca, Sc

• Li, Na, K

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NGSS.HS-PS1-1

The amount of energy required to remove the outermost electron from a gaseous atom in the ground state is known as

• first ionization energy

• activation energy

• conductivity

• electronegativity

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