HW: Periodic Trends

What is the total number of valence electrons in an atom of Boron (B) in the ground state?

Mathematical Equivalence

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The change in energy when an atom gains an electron is known as...

• activation energy

• electron affinity

• ionization energy

• electronegativity

What is the total number of valence electrons in an atom of Helium (He)?

• 8

• 0

• 18

• 2

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The elements Calcium (Ca) and Strontium (Sr) have similar chemical properties because they both have the same...

• atomic number

• number of valence electrons

• mass number

• number of filled subshells

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NGSS.HS-PS1-2

All elements within Group 16/6A have the same number of...

• valence electrons

• energy levels

• protons

• neutrons

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NGSS.HS-PS1-2

An element with a partially filled d subshell in the ground state is classified as...

• a transition metal

• a halogen

• an alkali metal

• an alkaline earth metal

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Which element in Period 5 of the periodic table is a transition metal?

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Which of the following atoms has the largest atomic radius?

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Which noble gas has the highest ionization energy?

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NGSS.HS-PS1-2

Arrange the following in the order of decreasing atomic radius.

• S

• P

• Al

• Si