Question 1

What is the name of the following compound? SF₃

Accepted Answer

The compound name SF₃ can be decoded using the Hill System, which assigns a letter or symbol to each element in the compound based on its atomic symbol. Using this system, the compound can be written as SF3S, which indicates that it contains one sulfur atom (S) and three fluorine atoms (F). The name for this compound is sulfur trifluoride, therefore answer A is the correct one.

Question 2

Which of the following is not a chemical change?

Accepted Answer

Crushing a rock to powder is a physical change because it changes the form of the rock without altering its chemical composition. The other options involve chemical changes where the substances undergo chemical reactions to form new substances.

Question 3

The systematic names for water,ammonia,and methane are dihydrogen monoxide, H₂ O; trihydrogen nitride,NH₃ ; and tetrahydrogen carbide,CH₄ .Why do most people,including chemists,prefer to use the common names for these compounds?

Accepted Answer

The common names for water, ammonia, and methane are shorter, easier to pronounce, widely known, and these compounds are encountered so frequently in both scientific and everyday contexts that their common names are preferred for convenience and clarity.

Question 4

How many different elements are in the compound C₆H₁₂O₆?

Accepted Answer

The answer of How many different elements are in the...

Question 5

Oxygen atoms are used to make water molecules.Does this mean that oxygen, O₂ ,and water, H₂ O,have similar properties?

Accepted Answer

Compounds are made up of different elements that have unique properties. While oxygen is used to make water molecules, the properties of oxygen and water are different because they have different chemical compositions and structures.

Question 6

If you have two molecules of TiO_2, how many oxygen atoms would you have?

Accepted Answer

Each molecule of TiO2 contains 2 oxygen atoms. Therefore, two molecules of TiO2 would contain 2 x 2 = 4 oxygen atoms.

Question 7

If you eat metallic sodium or inhale chlorine gas,you stand a strong chance of dying.Let these two elements react with each other,however,and you can safely sprinkle the compound on your popcorn for better taste.What is going on?

Accepted Answer

The answer of If you eat metallic sodium or inhale...

Question 8

In naming compounds,the prefix is used to

Accepted Answer

The prefix in naming compounds usually indicates the relative number of atoms of each element in the compound. For example, in carbon dioxide (CO2), the prefix "di-" indicates that there are two atoms of oxygen for every atom of carbon.

Question 9

Which of the following boxes represents a compound?    A B C

Accepted Answer

The answer of Which of the following boxes represents a...

Question 10

What is the name of the following compound? NaF

Accepted Answer

NaF is the chemical formula for sodium fluoride.

Question 11

When two elements come together to form a compound,which element is named first within the name of the compound?

Accepted Answer

The element toward the left-hand side of the periodic table is named first within the name of the compound. This is because elements on the left-hand side have fewer electrons in their valence shell and more readily give up electrons to form compounds with elements on the right-hand side of the periodic table.

Question 12

How many atoms are in one molecule of Na₂SO₄?

Accepted Answer

The answer of How many atoms are in one molecule...

Question 13

Which statement best describes a compound?

Accepted Answer

A compound is a material made up of a combination of atoms bonded together. This means that a compound contains two or more types of atoms that chemically combine and form a molecule. Examples of compounds include water (H2O), table salt (NaCl), and carbon dioxide (CO2).

Question 14

How many atoms of Oxygen (O)are in H₃OClO₄?

Accepted Answer

The chemical formula H₃OClO₄ contains one oxygen atom in H₃O and four oxygen atoms in ClO₄, totaling five oxygen atoms.

Question 15

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C.It is a weak conductor of electricity,its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air.Which of the following is a chemical property of silicon?

Accepted Answer

The ability of silicon to react with oxygen and form silicon dioxide is a chemical property as it involves a change in the composition of the substance. The other options are physical properties as they do not involve a change in composition.

Question 16

What is the name of the following compound? CaCl₂

Accepted Answer

The compound consists of calcium and chlorine ions, therefore it is calcium chloride. The presence of "₂" in the formula appears to be a typo or error.

Question 17

If you have one molecule of TiO_2, how many molecules of O₂ does it contain?

Accepted Answer

TiO_2, and O₂ are different molecules as they have different arrangements of atoms.

Question 18

Molecular oxygen,O2,and ozone,O3,are both examples of

Accepted Answer

Molecular oxygen (O2) and ozone (O3) are both forms of the element oxygen, making them examples of elements. They consist of only one type of atom, oxygen, in different molecular forms.

Question 19

What is the name of the following compound? CO₂

Accepted Answer

CO₂ is commonly known as carbon dioxide, which is a compound consisting of one carbon atom and two oxygen atoms.

Question 20

Nitrogen dioxide and dinitrogen tetroxide are really

Accepted Answer

Nitrogen dioxide (NO2) and dinitrogen tetroxide (N2O4) are different compounds with different molecular structures and properties. While nitrogen dioxide has a characteristic reddish-brown color and is a toxic gas, dinitrogen tetroxide is a colorless liquid at room temperature and is used as a rocket propellant. Their chemical formulas clearly indicate that they are different compounds, with NO2 indicating one nitrogen atom and two oxygen atoms and N2O4 indicating two nitrogen atoms and four oxygen atoms.

Quiz 14: Elements of Chemistry

What is the name of the following compound? SF₃

Which of the following is not a chemical change?

The systematic names for water,ammonia,and methane are dihydrogen monoxide, H₂ O; trihydrogen nitride,NH₃ ; and tetrahydrogen carbide,CH₄ .Why do most people,including chemists,prefer to use the common names for these compounds?

How many different elements are in the compound C₆H₁₂O₆?

Oxygen atoms are used to make water molecules.Does this mean that oxygen, O₂ ,and water, H₂ O,have similar properties?

If you have two molecules of TiO_2, how many oxygen atoms would you have?

If you eat metallic sodium or inhale chlorine gas,you stand a strong chance of dying.Let these two elements react with each other,however,and you can safely sprinkle the compound on your popcorn for better taste.What is going on?

In naming compounds,the prefix is used to

Which of the following boxes represents a compound? A B C

What is the name of the following compound? NaF

When two elements come together to form a compound,which element is named first within the name of the compound?

How many atoms are in one molecule of Na₂SO₄?

Which statement best describes a compound?

How many atoms of Oxygen (O) are in H₃OClO₄?

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C.It is a weak conductor of electricity,its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air.Which of the following is a chemical property of silicon?

What is the name of the following compound? CaCl₂

If you have one molecule of TiO_2, how many molecules of O₂ does it contain?

Molecular oxygen,O2,and ozone,O3,are both examples of

What is the name of the following compound? CO₂

Nitrogen dioxide and dinitrogen tetroxide are really

Quiz 14: Elements of Chemistry

What is the name of the following compound? SF3

Which of the following is not a chemical change?

The systematic names for water,ammonia,and methane are dihydrogen monoxide, H2 O; trihydrogen nitride,NH3 ; and tetrahydrogen carbide,CH4 .Why do most people,including chemists,prefer to use the common names for these compounds?

How many different elements are in the compound C6H12O6?

Oxygen atoms are used to make water molecules.Does this mean that oxygen, O2 ,and water, H2 O,have similar properties?

If you have two molecules of TiO2, how many oxygen atoms would you have?

If you eat metallic sodium or inhale chlorine gas,you stand a strong chance of dying.Let these two elements react with each other,however,and you can safely sprinkle the compound on your popcorn for better taste.What is going on?

In naming compounds,the prefix is used to

Which of the following boxes represents a compound? A B C

What is the name of the following compound? NaF

When two elements come together to form a compound,which element is named first within the name of the compound?

How many atoms are in one molecule of Na2SO4?

Which statement best describes a compound?

How many atoms of Oxygen (O) are in H3OClO4?

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C.It is a weak conductor of electricity,its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air.Which of the following is a chemical property of silicon?

What is the name of the following compound? CaCl2

If you have one molecule of TiO2, how many molecules of O2 does it contain?

Molecular oxygen,O2,and ozone,O3,are both examples of

What is the name of the following compound? CO2

Nitrogen dioxide and dinitrogen tetroxide are really

What is the name of the following compound? SF₃

The systematic names for water,ammonia,and methane are dihydrogen monoxide, H₂ O; trihydrogen nitride,NH₃ ; and tetrahydrogen carbide,CH₄ .Why do most people,including chemists,prefer to use the common names for these compounds?

How many different elements are in the compound C₆H₁₂O₆?

Oxygen atoms are used to make water molecules.Does this mean that oxygen, O₂ ,and water, H₂ O,have similar properties?

If you have two molecules of TiO_2, how many oxygen atoms would you have?

How many atoms are in one molecule of Na₂SO₄?

How many atoms of Oxygen (O) are in H₃OClO₄?

What is the name of the following compound? CaCl₂

If you have one molecule of TiO_2, how many molecules of O₂ does it contain?

What is the name of the following compound? CO₂