Bohr's Model & Electronic Configuration

Iron (Fe) is an effective conductor of heat and electricity. Select all of the other elements that most likely to have similar conductivities.

• sulfur (S)

• nickel (Ni)

• krypton (Kr)

• bromine (Br)

• potassium (K)

Sodium is a metal with one valence electron. Which of these elements has properties similar to sodium?

• magnesium

• potassium

• aluminum

• calcium

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NGSS.HS-PS1-1

Which metalloid is used in solar cells and computer chips?

• silicon

• silver

• arsenic

• antimony

In which pair of elements are both metalloids?

• A. Sn and Sb

• B. Sb and Te

• C. Te and I

• D. I and Xe

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A model of a magnesium ion is represented. The rings represent energy levels and the dots represent electrons that reside in those levels. Which magnesium ion is represented in the model?

• Mg1−

• Mg1+

• Mg2+

• Mg2−

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Which electron configuration shows the arrangement of electrons in an atom of bromine?

• [K] 4s2 3d10 4p5

• [Ar]4s2 3d10 4p5

• 1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p5

• 1s2 2s2 2p6 3s2 3p6 4p6 4d10

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The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table. Which element is classified as a metal?

• W

• X

• Y

• Z

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A model of an oxygen atom is shown. What is the charge in this oxygen atom?

• 0

• 2

• 6

• 8

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NGSS.MS-PS1-1

Which model represents a particle with no charge?

• A) 5p 6n

• B) 11p 12n

• C) 4p 5n

• D) 7p 7n

Oxygen belongs to group 16 (6A) in the periodic table. Which atom most likely has properties similar to those of oxygen?

• A) 16 n, 16 p

• B) 7 n, 7 p

• C) 18 n, 17 p

• D) 16 n, 15 p

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