Unit 1 - Atomic Structure & Periodic Trends ReTest

The maximum number of electrons that can occupy the 3rd energy level is

• 32

• 8

• 18

• 2

The element Sr has

• no empty p orbitals

• 2 valence electrons

• 7 energy levels

• one empty d orbital

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The electron configuration for atom X is 1s²2s²2p⁶3s²3p⁶4s²3d⁷. The atomic number of atom X is:

• 32

• 17

• 27

• 6

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The electron configuration for atom X is 1s²2s²2p⁶3s²3p⁶4s¹. This atom belongs in period number (on the periodic table):

• 3

• 5

• 6

• 4

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Which element, between calcium and bromine, in a period has the largest atomic radius?

• Germanium

• Bromine

• Gallium

• Calcium

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The element that has the greatest ionization energy is

• fluorine

• potassium

• chlorine

• zinc

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Element with the smallest atomic radius

• Na

• P

• Si

• Mg

• Cl

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Element which has properties of metals and nonmetals.

• Na

• P

• Si

• Mg

• Cl

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Element that forms a cation with the largest radius

• Na

• P

• Si

• Mg

• Cl

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Which of the following elements is most likely to have the lowest electronegativity?

• Fluorine

• Francium

• Oxygen

• Chlorine

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