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Exam 3: Elements, Compounds, and the Periodic Table

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Question 91

Multiple Choice

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Which is a correct name for the compound CoF₃?

A) cobalt fluoride
B) cobalt trifluoride
C) cobalt(III) fluoride
D) cobaltic trifluoride
E) cobaltous fluoride

F) C) and D)
G) A) and E)

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Question 92

Multiple Choice

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If the NtO₄² ion is called nortonate, what is the correct name for the compound K₂NtO₄?

A) dipotassium nortonium tetraoxide
B) dipotassium nortonate
C) potassium nortonate
D) potassium(I) nortonate
E) potassium(II) nortonate

F) A) and D)
G) A) and C)

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Question 93

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The vertical columns in the periodic table are numbered sequentially, 1 through ________ using Arabic numerals.

Metalloids tend to be malleable and ductile in nature.

What is the formula of the compound formed from Cr³⁺ and H₂PO₄^-?

Which of these pairs of elements would be most likely to form a molecular compound?

What is the correct formula for sodium sulfide?

As a general rule, molecular compounds are formed when nonmetallic elements combine.

Write the most likely formula for the ionic compound formed from magnesium and phosphorus.

List how many oxygen atoms are present in one formula unit of CoSO₄·6H₂O.

Which compound is not a simple hydrocarbon?

What is the name for Cu₂SO₃?

What is the name of the following compound: (NH₄)₂SO₄?

Write the formula for the hydrated compound that has the atoms and, or groups in the order given: 1 K, 1 Al, two groups of 1 S and 4 O_, and twelve groups made up of 2 H and 1 O. Hint: The groups of atoms are clusters such as polyatomic ions or water.

How many hydrogen atoms appear on the reactant side of the equation, 4NH₃ + 3O₂ ? 2N₂ + 6H₂O?

List how many oxygen atoms are present in one molecule of H₃PO₄

Engrium sulfate has the formula, En₂(SO₄) ₃, while sodium nortonite has the formula Na₂NtO₃. Based on these names and formulas, what would you expect for the formula of engrium nortonate? (Imaginary elements are used in this question.) Hint: Consider the rules for forming ionic compounds to figure out what the possible charge is. Remember ionic compounds are neutral.

The name for As₄S₁₀ is ________.

What is the formula for magnesic perchlorate?

How many hydrogen atoms are present in the formula, (NH₄)₃PO₄?