Question 1

In what ratio will alkaline earth metals pair with chalcogens when they form ionic compounds?

Accepted Answer

A) 3:1 
B) 2:1 
C) 1:1 
D) 1:2 
E) 1:3 
A) 3:1 
B) 2:1 
C) 1:1 
D) 1:2 
E) 1:3

Question 2

Silicon is best described as a _______.

Accepted Answer

A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal. 
A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal.

Question 3

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 79 protons, 76 electrons, and 118 neutrons.

Accepted Answer

The answer of Write the complete atomic symbol with both...

Question 4

What is the charge on an alkaline earth metal atom when it is in an ionic compound?

Accepted Answer

The answer of What is the charge on an alkaline...

Question 5

If the nucleus of an atom had a diameter of 1 cm roughly that of a dime, what would be the approximate diameter of the atom? The radius of the nucleus is approximately 10,000 times smaller than the radius of an atom.

Accepted Answer

A) 1000 km 
B) 10 km 
C) 1000 m 
D) 100 m 
E) 1 m 
A) 1000 km 
B) 10 km 
C) 1000 m 
D) 100 m 
E) 1 m

Question 6

What is the charge on the manganese ion in MnS2?

Accepted Answer

A) (+4) 
B) (+2) 
C) (+1) 
D) (-1) 
E) (-2) 
A) (+4) 
B) (+2) 
C) (+1) 
D) (-1) 
E) (-2)

Question 7

Which two elements would you expect to show the most similar behavior?

Accepted Answer

A) Se and Br 
B) B and C 
C) Li and Be 
D) Sn and Bi 
E) Ca and Sr 
A) Se and Br 
B) B and C 
C) Li and Be 
D) Sn and Bi 
E) Ca and Sr

Question 8

Which statement regarding Rutherford's nuclear model of the atom is FALSE?

Accepted Answer

A) The diameter of the atom is approximately 10,000 times larger than the nucleus. 
B) The nucleus is approximately 100 times smaller than the diameter of the atom. 
C) The nucleus is surrounded by a diffuse cloud of electrons. 
D) Electrons and protons are not mixed uniformly throughout the atom. 
E) The atom is mostly empty space. 
A) The diameter of the atom is approximately 10,000 times larger than the nucleus. 
B) The nucleus is approximately 100 times smaller than the diameter of the atom. 
C) The nucleus is surrounded by a diffuse cloud of electrons. 
D) Electrons and protons are not mixed uniformly throughout the atom. 
E) The atom is mostly empty space.

Question 9

You synthesize a superheavy atom that fits into the periodic table below radium.If it were to form an ion, what ionic charge would you predict?

Accepted Answer

A) (+2) 
B) (+1) 
C) (-1) 
D) (-2) 
E) 0 (unlikely to form an ion) 
A) (+2) 
B) (+1) 
C) (-1) 
D) (-2) 
E) 0 (unlikely to form an ion)

Question 10

TNT (C7H5N3O6, 227.13 g/mol) and RDX (C3H6N6O6, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

Accepted Answer

A) 3.45 *1023 molecules RDX 
B) 145 g TNT 
C) 95.4 g RDX 
D) 4.25 * 1023 molecules TNT 
E) 0.875 mol RDX 
A) 3.45 *1023 molecules RDX 
B) 145 g TNT 
C) 95.4 g RDX 
D) 4.25 * 1023 molecules TNT 
E) 0.875 mol RDX

Question 11

Protons and neutrons are examples of _______.

Accepted Answer

A) nuclei. 
B) nuclides. 
C) nucleons. 
D) isotopes. 
E) charged particles. 
A) nuclei. 
B) nuclides. 
C) nucleons. 
D) isotopes. 
E) charged particles.

Question 12

Which of the following statements is FALSE?

Accepted Answer

A) The identity of an atom can be determined solely by its atomic number. 
B) The identity of an isotope can be determined solely by its mass number. 
C) Atoms of different elements may have the same mass numbers. 
D) Atoms of different elements cannot contain the same number of protons. 
E) The different isotopes of an element are not always equally abundant. 
A) The identity of an atom can be determined solely by its atomic number. 
B) The identity of an isotope can be determined solely by its mass number. 
C) Atoms of different elements may have the same mass numbers. 
D) Atoms of different elements cannot contain the same number of protons. 
E) The different isotopes of an element are not always equally abundant.

Question 13

In the presence of cyanuric acid (C3H3N3O3), melamine (C3H6N6) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

Accepted Answer

A) 1.22 * 1024 C3H6N6 molecules 
B) 2.78 mol C3H6N6 
C) 6.54 * 1024 C3H3N3O3 molecules 
D) 10.3 mol C3H3N3O3 
E) 2.56 mol C3H6N6 + 2.56 mol C3H3N3O3 
A) 1.22 * 1024 C3H6N6 molecules 
B) 2.78 mol C3H6N6 
C) 6.54 * 1024 C3H3N3O3 molecules 
D) 10.3 mol C3H3N3O3 
E) 2.56 mol C3H6N6 + 2.56 mol C3H3N3O3

Question 14

Boron, which has an average atomic mass of 10.81 amu, has two stable isotopes: boron-10 and boron-11.Boron-10 has an atomic mass of 10.0129 amu and a natural abundance of 19.78%.What is the atomic mass of boron-11?

Accepted Answer

The answer of Boron, which has an average atomic mass...

Question 15

Calculate the number of hydrogen atoms in 0.25 mol of strychnine, C21H22N2O2.

Accepted Answer

A) 5.5 * 1024 atoms 
B) 3.3 * 1024 atoms 
C) 2.5 *1024 atoms 
D) 1.5 * 1024 atoms 
E) 5.0 * 1025 molecules 
A) 5.5 * 1024 atoms 
B) 3.3 * 1024 atoms 
C) 2.5 *1024 atoms 
D) 1.5 * 1024 atoms 
E) 5.0 * 1025 molecules

Question 16

Iron has four naturally occurring isotopes, one of which is far more abundant that the others.Iron has an average atomic mass of 55.845 amu.Which isotope is most abundant?

Accepted Answer

A) 54Fe, 53.9396 amu 
B) 56Fe, 55.9349 amu 
C) 57Fe, 56.9354 amu 
D) 58Fe, 57.9333 amu 
E) 70Zn, 69.9253 amu 
A) 54Fe, 53.9396 amu 
B) 56Fe, 55.9349 amu 
C) 57Fe, 56.9354 amu 
D) 58Fe, 57.9333 amu 
E) 70Zn, 69.9253 amu

Question 17

The average atomic mass of lithium is 6.941 amu.Lithium has two naturally occurring isotopes, 6Li (7.52%) and 7Li (92.48%).The mass of 6Li is 6.0151 amu.What is the isotopic mass of 7Li?

Accepted Answer

A) 7.016 amu 
B) 7.505 amu 
C) 6.001 amu 
D) 7.000 amu 
E) 6.941 amu 
A) 7.016 amu 
B) 7.505 amu 
C) 6.001 amu 
D) 7.000 amu 
E) 6.941 amu

Question 18

Antirrhinin chloride (C27H11O6Cl, 630.97 g/mol) contains the antirrhinin ion, a pigment found in açai berries.Calculate the number of moles of carbon in 1.5 g of antirrhinin chloride.

Accepted Answer

A) 2.4 *10-3 mol 
B) 6.4 * 10-2 mol 
C) 8.6 * 10-2 mol 
D) 3.2 * 10-3 mol 
E) 8.8 * 10-5 mol 
A) 2.4 *10-3 mol 
B) 6.4 * 10-2 mol 
C) 8.6 * 10-2 mol 
D) 3.2 * 10-3 mol 
E) 8.8 * 10-5 mol

Question 19

How many hydrogen atoms are there in 407 g of ethanol, C2H6O?

Accepted Answer

407/46.07 *6.02* 10<

Question 20

Give an example of an alkaline earth metal.

Accepted Answer

beryllium, magnesium

Exam 2: Atoms, Ions, and Molecules the Building Blocks of Matter

In what ratio will alkaline earth metals pair with chalcogens when they form ionic compounds?

Silicon is best described as a _______.

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 79 protons, 76 electrons, and 118 neutrons.

What is the charge on an alkaline earth metal atom when it is in an ionic compound?

If the nucleus of an atom had a diameter of 1 cm roughly that of a dime, what would be the approximate diameter of the atom? The radius of the nucleus is approximately 10,000 times smaller than the radius of an atom.

What is the charge on the manganese ion in MnS2?

Which two elements would you expect to show the most similar behavior?

Which statement regarding Rutherford's nuclear model of the atom is FALSE?

You synthesize a superheavy atom that fits into the periodic table below radium.If it were to form an ion, what ionic charge would you predict?

TNT (C7H5N3O6, 227.13 g/mol) and RDX (C3H6N6O6, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

Protons and neutrons are examples of _______.

Which of the following statements is FALSE?

In the presence of cyanuric acid (C3H3N3O3), melamine (C3H6N6) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

Boron, which has an average atomic mass of 10.81 amu, has two stable isotopes: boron-10 and boron-11.Boron-10 has an atomic mass of 10.0129 amu and a natural abundance of 19.78%.What is the atomic mass of boron-11?

Calculate the number of hydrogen atoms in 0.25 mol of strychnine, C21H22N2O2.

Iron has four naturally occurring isotopes, one of which is far more abundant that the others.Iron has an average atomic mass of 55.845 amu.Which isotope is most abundant?

The average atomic mass of lithium is 6.941 amu.Lithium has two naturally occurring isotopes, 6Li (7.52%) and 7Li (92.48%).The mass of 6Li is 6.0151 amu.What is the isotopic mass of 7Li?

Antirrhinin chloride (C27H11O6Cl, 630.97 g/mol) contains the antirrhinin ion, a pigment found in açai berries.Calculate the number of moles of carbon in 1.5 g of antirrhinin chloride.

How many hydrogen atoms are there in 407 g of ethanol, C2H6O?

Give an example of an alkaline earth metal.

Matter and Energy an Atomic Perspective

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

Filters

What is the charge on the manganese ion in MnS₂?

TNT (C₇H₅N₃O₆, 227.13 g/mol) and RDX (C₃H₆N₆O₆, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

In the presence of cyanuric acid (C₃H₃N₃O₃), melamine (C₃H₆N₆) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

Calculate the number of hydrogen atoms in 0.25 mol of strychnine, C₂₁H₂₂N₂O₂.

The average atomic mass of lithium is 6.941 amu.Lithium has two naturally occurring isotopes, ⁶Li (7.52%) and ⁷Li (92.48%).The mass of ⁶Li is 6.0151 amu.What is the isotopic mass of ⁷Li?

Antirrhinin chloride (C₂₇H₁₁O₆Cl, 630.97 g/mol) contains the antirrhinin ion, a pigment found in açai berries.Calculate the number of moles of carbon in 1.5 g of antirrhinin chloride.

How many hydrogen atoms are there in 407 g of ethanol, C₂H₆O?