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Exam 7: Periodic Properties of the Elements

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Question 41

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Which equation correctly represents the electron affinity of calcium?

A) Ca (g) + e^- → Ca^- (g)
B) Ca (g) → Ca⁺ (g) + e^-
C) Ca (g) → Ca^- (g) + e^-
D) Ca^- (g) → Ca (g) + e^-
E) Ca⁺ (g) + e^- → Ca (g)

F) None of the above
G) A) and B)

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Question 42

Multiple Choice

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Which element is solid at room temperature?

A) Cl₂
B) F₂
C) Br₂
D) I₂
E) H₂

F) B) and D)
G) A) and B)

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Question 43

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The effective nuclear charge in an atom is proportional to the number of nuclear protons.

Which equation correctly represents the third ionization of aluminum?

List seven nonmetals that exist as diatomic molecules in their elemental forms.

Electrons in the 1s subshell are much closer to the nucleus in Ar than in He due to the larger ________ in Ar.

Xenon has been shown to form compounds only when it is combined with ________.

Consider the following properties of an element: (i) It is solid at room temperature. (ii) It easily forms an oxide when exposed to air. (iii) When it reacts with water, hydrogen gas evolves. (iv) It must be stored submerged in oil. Which element fits the above description the best?

The element(s) ________ could be used to produce a red or crimson color in fireworks.

A tin atom has 50 electrons. Electrons in the ________ subshell experience the lowest effective nuclear charge.

The list that correctly indicates the order of metallic character is ________.

Which of the following correctly represents the second ionization of copper?

Cl₂ (g) + H₂O (l) → ________

This element reacts with hydrogen to produce a gas with the formula HX. When dissolved in water, HX forms an acidic solution. X is ________.

The effective nuclear charge of an atom is primarily affected by ________.

Of the following elements, which have been shown to form compounds? helium neon argon krypton xenon

The reaction of a metal with a nonmetal produces a(n) ________.

Complete the following: P₄O₁₀ + 6H₂O →

When electrons are removed from a lithium atom, they are removed first from which orbital?

Hydrogen is unique among the elements because ________. 1. It has only one valence electron. 2. It is the only element that can emit an atomic spectrum. 3. Its electron is not at all shielded from its nucleus. 4. It is the lightest element. 5. It is the only element to exist at room temperature as a diatomic gas.