Week 2

Grading Summary

Grade Details - All Questions

Question 1. Question : (TCO 3) Which of the statements about transition metals is true?

Student Answer:

Transition metals can gain or lose electrons to form anions or

cations.

Transition metals can gain a variable number of electrons to form

two or more different anions.

All transition metals form at least two different ions.

All of the above statements

None of the above

Instructor

Explanation:

Chapter 4

Points Received: 2 of 2

Comments:

Question 2. Question : (TCO 3) Hydrogen combines with oxygen to form water. Which of the

statements below best describes the bond that forms between

hydrogen and oxygen?

Student Answer:

It is an ionic bond in which the hydrogen and oxygen atoms are

held together by sharing electrons.

It is an ionic bond in which the hydrogen atom accepts electrons

from the oxygen atom.

It is a covalent bond in which the hydrogen atom donates

electrons to the oxygen atom.

It is a covalent bond in which the hydrogen atom accepts

electrons from the oxygen atom.

It is a covalent bond in which the hydrogen and oxygen atoms are

held together by sharing electrons.

Instructor

Explanation:

Chapter 4

Points Received: 2 of 2

Comments:

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Question 3. Question : (TCO 3) Which of the following bonds would you predict to be nonpolar

covalent?

Student

Answer: C-P

Li-F

Br-P

Na-Cl

S-F

Instructor

Explanation:

See Chapter 4. Atoms with an electronegativity difference of 0.4 or less will form a

nonpolar covalent bond.

Points Received: 2 of 2

Comments:

Question 4. Question : (TCO 3) How many atoms of oxygen are found in a molecule of

Zn3(PO4)2?

Student

Answer: Three

Four

Seven

Eight

10

Instructor

Explanation:

See Chapter 4. Each PO4

3-

ion has four O atoms. There are two PO4

3- ions, so there are eight total O atoms.

Points Received: 2 of 2

Comments:

Question 5. Question : (TCO 3) Rhea has a balloon that contains 0.5 mole of helium. How

many particles of helium are in the balloon?

Student Answer:

3.01

3.01 × 1022

3.01 × 1023

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