Question 1

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, typically between a metal and a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

What is the total number of electrons in an atom with the electron configuration $$[\mathrm{Kr}]5s^24$d^{10}5p^2$?

Accepted Answer

$$52$$

Question 3

How many valence electrons are present in an atom with the electron configuration $$[\mathrm{Kr}]5s^24$d^{10}5p^2$?

Accepted Answer

$$4$$

Question 4

Which of the following ions is formed when a chlorine atom gains one electron?

Accepted Answer

$$\mathrm{Cl}^-$$

Question 5

A magnesium atom loses two electrons to form a cation. What is the electron configuration of the resulting $$\mathrm{Mg}^{2+}$$ ion?

Accepted Answer

$$1s^22s^22$p^6$$

Question 6

Which of the following best explains why ionic compounds have high melting and boiling points?

Accepted Answer

They are composed of ions held together by strong electrostatic attractions.

Question 7

What is the correct formula for the ionic compound formed between calcium and chlorine?

Accepted Answer

$$\mathrm{CaCl}_2$$

Question 8

Which of the following is the correct name for $$\mathrm{Fe}^{3+}$$ using the systematic naming system?

Accepted Answer

Iron(III)

Question 9

What is the correct formula for aluminum sulfate?

Accepted Answer

$$\mathrm{Al}_2(\mathrm{SO}_4)_3$$

Question 10

Which of the following statements about polyatomic ions is correct?

Accepted Answer

Polyatomic ions can be either cations or anions.

Question 11

A patient is given a medication containing $$\mathrm{NaHCO}_3. $$What is the correct name for this compound?

Accepted Answer

Sodium bicarbonate

Question 12

Which of the following is the correct formula for ammonium sulfite?

Accepted Answer

$$(\mathrm{NH}_4)_2\mathrm{SO}_3$$

Question 13

Which of the following ions is isoelectronic with neon ($$\mathrm{Ne}$$)?

Accepted Answer

$$\mathrm{Na}^+$$

Question 14

What is the correct name for $$\mathrm{Cr(NO}_2)_2$$?

Accepted Answer

Chromium(II) nitrite

Question 15

Which of the following best describes the octet rule?

Accepted Answer

Atoms are most stable when they have eight electrons in their outer shell.

Question 16

What is the correct formula for lithium hydroxide?

Accepted Answer

$$\mathrm{LiOH}$$

Question 17

A compound is formed between $$\mathrm{Al}^{3+}$$ and $$\mathrm{O}^{2-}. $$What is its correct formula?

Accepted Answer

$$\mathrm{Al}_2\mathrm{O}_3$$

Question 18

Which of the following is the correct name for $$\mathrm{Mg}_3(\mathrm{PO}_4)_2$$?

Accepted Answer

Magnesium phosphate

Question 19

Which of the following is the correct ion symbol for an atom with 20 protons and 18 electrons?

Accepted Answer

$$\mathrm{Ca}^{2+}$$

Question 20

Which of the following is the correct formula for tin(IV) oxide?

Accepted Answer

$$\mathrm{SnO}_2$$

Ionic Compounds: Structure, Formation, and Nomenclature 3

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