AP CHEM Unit 10 Day 01 Practice

Analyze the Mass Spectrum Graph. Calculate the average atomic mass of the unknown element.

• 10.2 amu

• 10.5 amu

• 10.8 amu

• 11.0 amu

Analyze the Mass Spectrum Graph. What is the most likely identity of the element?

• Sodium

• Neon

• Carbon

• Boron

The atomic weight of a newly discovered element is 10.600 amu. It has two naturally occurring isotopes. One has a mass of 10.000 and a natural abundance of 70.000%. What is the isotopic mass of the other isotope?

• 12.00 amu

• 10.60 amu

• 11.50 amu

• 11.00 amu

How many UNPAIRED electrons are predicted for the ground-state configuration of Ni?

• 0

• 8

• 2

• 6

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What is the noble gas electron configuration for an atom of iodine in the ground state?

• [Kr]5s²4d¹⁰5p⁵

• [Xe]5s²4d¹⁰5p⁵

• [Kr]5s²5d¹⁰5p⁵

• [Xe]5s²4d¹⁰5p⁵

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What is the electron configuration of V²⁺?

• [Ar] 4s²3d³

• [Ar] 4s¹3d⁴

• [Ar] 3d³

• [Ar] 4s²3d¹

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Sodium chloride is used as table salt. Select the electron configuration of the ion that would form an ionic bond with a chloride ion with a salty taste like sodium chloride.

• 1s²2s²

• 1s²2s²2p⁵

• 1s²

• 1s²2s¹

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Lithium nitride can cause severe irritation to the nose and throat if inhaled.  The correct orbital diagram for the valence electrons of the positively and negatively charged ion respectively are

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Which of the following best represents the ground state configurations of a neutral atom of a halogen and its respective negative ion?

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Which orbital notation represents an atom in the ground state with four valence electrons?

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