Periodic Table, Trends, and Electrons Review

The shaded areas in these periodic tables represent the strength of the pull between nuclei and electrons. The darker shading indicates the more powerful the attraction. Which two diagrams best depicts the trend of atomic radius.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to Hund's rule to maintain stability in an orbital, a pair of electrons need to

• spin in opposite directions

• fill up lower energy levels first

• increase their energy level

• spin in the same direction

An element that has the electron configuration of [Ar] 4s² 3d¹⁰ 4p⁶, would also have an atomic number equal to _______.

• 8

• 10

• 36

• 44

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NGSS.HS-PS1-1

The element in Period 3 that has the highest ionization energy is

• an alkali metal

• an alkaline earth metal

• a halogen

• a noble gas

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NGSS.HS-PS1-1

Which of the following trends in the periodic table should be expected as the atomic number of the elements in the halogen family goes up?

• Atomic radius increases

• Atomic mass decreases

• Electronegativity decreases

• ionization energy increases

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NGSS.HS-PS1-1

How many total orbitals can be found on the 2nd energy level

• two orbitals

• four orbitals

• nine orbitals

• eight orbitals

Excited state configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d4

What is the element?

• molybdenum

• nickel

• silicon

• Niobium

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Calculate the wavelength of a wave that has a frequency of 4.87 x 10¹⁴ Hz.

• 6.23 x 10⁶ m

• 6.23 x 10²² m

• 6.16 x 10^-7 m

• 1.62 x 10⁶ m

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NGSS.HS-PS4-1

Which of the following sublevels cannot exist?

• 1s

• 4p

• 2d

• 6f

For each period on the periodic table, the atoms of noble gases will always have the

• smallest atomic radius and lowest ionization energy

• smallest atomic radius and highest ionization energy

• largest atomic radius and lowest ionization energy

• largest atomic radius and highest ionization energy

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NGSS.HS-PS1-1

NGSS.HS-PS1-2