Question 1

Which of the following sets of elements is arranged in order of increasing
Metallic character?

Accepted Answer

Metallic character increases down a group and decreases across a period from left to right in the periodic table. Among the options, only D (Al < Ca < Ba) correctly follows this trend, with aluminum (Al) being to the right of calcium (Ca) and barium (Ba) in the same group but below calcium, indicating an increase in metallic character.

Question 2

Which of the following metals is the most "active," the metal which should react most rapidly with oxygen or water vapor in the atmosphere?

Accepted Answer

Ba is the most active metal among the given choices. It reacts rapidly with oxygen and water vapor in the atmosphere, forming barium oxide and barium hydroxide, respectively.

Question 3

Which of the following metals would be the most reactive towards air and water?

Accepted Answer

Calcium (Ca) is the most reactive metal towards air and water among the options given. This is because it is an alkaline earth metal, which are known for their reactivity, especially when compared to metals like aluminum (Al), silver (Ag), tin (Sn), and lead (Pb).

Question 4

Predict the formula of the neutral ionic compound formed from K⁺ and S^2-.

Accepted Answer

The neutral ionic compound is formed by balancing the charges of the ions. Potassium ion (K⁺) has a +1 charge, and sulfide ion (S²⁻) has a -2 charge. To balance the charges, two K⁺ ions are needed for every one S²⁻ ion, resulting in the formula K₂S.

Question 5

Predict the formula of the neutral ionic compound formed from Mg²⁺ and PO₄^3-.

Accepted Answer

The charges of Mg²⁺ and PO₄^3- must balance to form a neutral compound. Three Mg²⁺ ions (total +6 charge) and two PO₄^3- ions (total -6 charge) balance each other, resulting in the formula Mg₃(PO₄)₂.

Question 6

Predict the formula of the electrically neutral compound formed from the Following ions: Ca²⁺ and PO₄^3-.

Accepted Answer

To balance the charges, 3 Ca²⁺ ions are needed for every 2 PO₄^3- ions, resulting in the formula Ca₃(PO₄)₂.

Question 7

Predict the formula of the electrically neutral compound formed from the following ions: K⁺ and CrO₄^2-.

Accepted Answer

The ions given are K+ and $CrO_4^{2-}$. The correct formula for a neutral compound formed from these ions would be K2CrO4, which is not listed among the options provided.

Question 8

Predict the formula of the ionic compound formed between an aluminum cation, Al³⁺, and a carbonate polyatomic anion.

Accepted Answer

The aluminum cation has a charge of +3, and the carbonate anion has a charge of -2. To balance the charges, two aluminum ions (total +6) are needed for three carbonate ions (total -6), resulting in the formula Al₂(CO₃)₃.

Question 9

A mineral called montmorillonite will catalyze some interesting reactions. The formula of one type of montmorillonite is NaCa₄(Si₂O₅)₄F. If Na has a charge of +1, Ca has a charge of +2, and F has a charge of -1, what is the charge on each Si₂O₅ complex ion?

Accepted Answer

The answer of A mineral called montmorillonite will catalyze some...

Question 10

Aluminum chlorhydrate is added to antiperspirants to stop people from sweating. If this compound contains neutral H₂O molecules and Al³⁺, OH^-, and Cl^- ions, and the formula of this compound is Al_x(OH)₅Cl • 2 H₂O, what is the value of x in this formula?

Accepted Answer

The compound is neutral, so the total positive charge must equal the total negative charge. The positive charge comes from the Al³⁺ ions, and the negative charge comes from the OH^- and Cl^- ions. The formula of the compound is Al_x(OH)₅Cl • 2 H₂O, so there are x Al³⁺ ions, 5 OH^- ions, and 1 Cl^- ion. The total positive charge is 3x, and the total negative charge is 5 + 1 = 6. Therefore, 3x = 6, and x = 2.

Question 11

Predict the formulas for neutral compounds containing the following pairs of ions. A) H⁺ and O₂^2- B) Zn²⁺ and PO₄^3- C) K⁺ and [PtCl6]2^-

Accepted Answer

The answer of Predict the formulas for neutral compounds containing...

Question 12

What is the formula of the neutral compound which might be formed from P⁵⁺ and S^2-?

Accepted Answer

To form a neutral compound, the total positive charge must equal the total negative charge. P^5+ and S^2- combine in a ratio that balances the charges: 2 P^5+ ions (total +10 charge) and 5 S^2- ions (total -10 charge) form P2S5.

Question 13

If the formula for aluminum oxide is Al₂O₃, what would be the formulas for aluminum fluoride and aluminum sulfide?

Accepted Answer

The answer of If the formula for aluminum oxide is...

Question 14

What is the charge on the [Co(NO₂)₆]^x ion if this complex ion is formed by combining Co³⁺ and NO₂^- ions?

Accepted Answer

The charge on the complex ion is equal to the sum of the charges on the metal ion and the ligands. In this case, the metal ion is Co³⁺ and the ligands are NO₂^- ions. The charge on the NO₂^- ion is -1, so the charge on the complex ion is 3 + (-1 * 6) = -3.

Question 15

A main-group $\underline{\text{ metal }}$ reacts with hydrogen and oxygen to form compounds with the formulas XH₄ and XO₂ (X represents the metal). In which group of the periodic table does this element belong?

Accepted Answer

The compounds formed are XH4 and XO2, indicating the metal forms four bonds with hydrogen and two double bonds with oxygen. This behavior is characteristic of Group IVA (4) elements, such as carbon or silicon, which can form four covalent bonds.

Question 16

What is the most likely charge for a calcium ion?

Accepted Answer

Calcium tends to lose two electrons to achieve a stable electron configuration, resulting in a +2 charge.

Question 17

Which of the following elements would be the most likely to form an oxide with the formula XO and a hydride with the formula XH₂ (X represents the unknown element)?

Accepted Answer

The answer of Which of the following elements would be...

Question 18

An element, X, forms the ionic compound CaX. X is a member of:

Accepted Answer

The answer of An element, X, forms the ionic compound...

Question 19

Magnesium metal reacts with hydrogen gas to form a white solid

Accepted Answer

The answer of Magnesium metal reacts with hydrogen gas to...

Question 20

Which element is hydrogen most like to combine with to form a hydride?

Accepted Answer

Hydrogen tends to form hydrides by combining with more electropositive elements, among which sodium (Na) is a good example, being a highly reactive alkali metal.

Quiz 5: Ionic and Metallic Bonds

Which of the following sets of elements is arranged in order of increasing Metallic character?

Which of the following metals is the most "active," the metal which should react most rapidly with oxygen or water vapor in the atmosphere?

Which of the following metals would be the most reactive towards air and water?

Predict the formula of the neutral ionic compound formed from K⁺ and S^2-.

Predict the formula of the neutral ionic compound formed from Mg²⁺ and PO₄^3-.

Predict the formula of the electrically neutral compound formed from the Following ions: Ca²⁺ and PO₄^3-.

Predict the formula of the electrically neutral compound formed from the following ions: K⁺ and CrO₄^2-.

Predict the formula of the ionic compound formed between an aluminum cation, Al³⁺, and a carbonate polyatomic anion.

A mineral called montmorillonite will catalyze some interesting reactions. The formula of one type of montmorillonite is NaCa₄(Si₂O₅) ₄F. If Na has a charge of +1, Ca has a charge of +2, and F has a charge of -1, what is the charge on each Si₂O₅ complex ion?

Aluminum chlorhydrate is added to antiperspirants to stop people from sweating. If this compound contains neutral H₂O molecules and Al³⁺, OH^-, and Cl^- ions, and the formula of this compound is Al_x(OH) ₅Cl • 2 H₂O, what is the value of x in this formula?

Predict the formulas for neutral compounds containing the following pairs of ions. A) H⁺ and O₂^2- B) Zn²⁺ and PO₄^3- C) K⁺ and [PtCl6]2^-

What is the formula of the neutral compound which might be formed from P⁵⁺ and S^2-?

If the formula for aluminum oxide is Al₂O₃, what would be the formulas for aluminum fluoride and aluminum sulfide?

What is the charge on the [Co(NO₂) ₆]^x ion if this complex ion is formed by combining Co³⁺ and NO₂^- ions?

A main-group $\underline{\text{ metal }}$ reacts with hydrogen and oxygen to form compounds with the formulas XH₄ and XO₂ (X represents the metal) . In which group of the periodic table does this element belong?

What is the most likely charge for a calcium ion?

Which of the following elements would be the most likely to form an oxide with the formula XO and a hydride with the formula XH₂ (X represents the unknown element) ?

An element, X, forms the ionic compound CaX. X is a member of:

Magnesium metal reacts with hydrogen gas to form a white solid

Which element is hydrogen most like to combine with to form a hydride?

Quiz 5: Ionic and Metallic Bonds

Which of the following sets of elements is arranged in order of increasing Metallic character?

Which of the following metals is the most "active," the metal which should react most rapidly with oxygen or water vapor in the atmosphere?

Which of the following metals would be the most reactive towards air and water?

Predict the formula of the neutral ionic compound formed from K+ and S2-.

Predict the formula of the neutral ionic compound formed from Mg2+ and PO43-.

Predict the formula of the electrically neutral compound formed from the Following ions: Ca2+ and PO43-.

Predict the formula of the electrically neutral compound formed from the following ions: K+ and CrO42-.

Predict the formula of the ionic compound formed between an aluminum cation, Al3+, and a carbonate polyatomic anion.

A mineral called montmorillonite will catalyze some interesting reactions. The formula of one type of montmorillonite is NaCa4(Si2O5) 4F. If Na has a charge of +1, Ca has a charge of +2, and F has a charge of -1, what is the charge on each Si2O5 complex ion?

Aluminum chlorhydrate is added to antiperspirants to stop people from sweating. If this compound contains neutral H2O molecules and Al3+, OH-, and Cl- ions, and the formula of this compound is Alx(OH) 5Cl • 2 H2O, what is the value of x in this formula?

Predict the formulas for neutral compounds containing the following pairs of ions. A) H+ and O22- B) Zn2+ and PO43- C) K+ and [PtCl6]2-

What is the formula of the neutral compound which might be formed from P5+ and S2-?

If the formula for aluminum oxide is Al2O3, what would be the formulas for aluminum fluoride and aluminum sulfide?

What is the charge on the [Co(NO2) 6]x ion if this complex ion is formed by combining Co3+ and NO2- ions?

A main-group metal ‾\underline{\text{ metal }} metal ​ reacts with hydrogen and oxygen to form compounds with the formulas XH4 and XO2 (X represents the metal) . In which group of the periodic table does this element belong?

What is the most likely charge for a calcium ion?

Which of the following elements would be the most likely to form an oxide with the formula XO and a hydride with the formula XH2 (X represents the unknown element) ?

An element, X, forms the ionic compound CaX. X is a member of:

Magnesium metal reacts with hydrogen gas to form a white solid

Which element is hydrogen most like to combine with to form a hydride?

Predict the formula of the neutral ionic compound formed from K⁺ and S^2-.

Predict the formula of the neutral ionic compound formed from Mg²⁺ and PO₄^3-.

Predict the formula of the electrically neutral compound formed from the Following ions: Ca²⁺ and PO₄^3-.

Predict the formula of the electrically neutral compound formed from the following ions: K⁺ and CrO₄^2-.

Predict the formula of the ionic compound formed between an aluminum cation, Al³⁺, and a carbonate polyatomic anion.

A mineral called montmorillonite will catalyze some interesting reactions. The formula of one type of montmorillonite is NaCa₄(Si₂O₅) ₄F. If Na has a charge of +1, Ca has a charge of +2, and F has a charge of -1, what is the charge on each Si₂O₅ complex ion?

Aluminum chlorhydrate is added to antiperspirants to stop people from sweating. If this compound contains neutral H₂O molecules and Al³⁺, OH^-, and Cl^- ions, and the formula of this compound is Al_x(OH) ₅Cl • 2 H₂O, what is the value of x in this formula?

Predict the formulas for neutral compounds containing the following pairs of ions. A) H⁺ and O₂^2- B) Zn²⁺ and PO₄^3- C) K⁺ and [PtCl6]2^-

What is the formula of the neutral compound which might be formed from P⁵⁺ and S^2-?

If the formula for aluminum oxide is Al₂O₃, what would be the formulas for aluminum fluoride and aluminum sulfide?

What is the charge on the [Co(NO₂) ₆]^x ion if this complex ion is formed by combining Co³⁺ and NO₂^- ions?

A main-group $\underline{\text{ metal }}$ reacts with hydrogen and oxygen to form compounds with the formulas XH₄ and XO₂ (X represents the metal) . In which group of the periodic table does this element belong?

Which of the following elements would be the most likely to form an oxide with the formula XO and a hydride with the formula XH₂ (X represents the unknown element) ?