Question 1

Match the terms with their most suitable description.
-positive charge

Accepted Answer

An atom has a positive charge when the number of protons (positively charged particles) exceeds the number of electrons (negatively charged particles). This imbalance results in a net positive charge.

Question 2

Match the following terms with the best description.
-a charged atom

Accepted Answer

A charged atom is called an ion.

Question 3

​Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description.​
-the water containing dissolved salt

Accepted Answer

A solution is formed when a solute (salt) is dissolved in a solvent (water), resulting in a homogeneous mixture. Therefore, the water containing dissolved salt is a solution.

Question 4

Match the following terms with the best description.
-separation of charge into positive and negative regions of a molecule

Accepted Answer

Polarity refers to the separation of charge into positive and negative regions of a molecule. The other options are not related to this specific concept.

Question 5

Match the terms with their most suitable description.
-neutral

Accepted Answer

A neutral atom has an equal number of protons and electrons, resulting in no overall charge.

Question 6

Match the following terms with the best description.
-a type of molecule that has atoms of two or more elements

Accepted Answer

A compound is a type of molecule that has atoms of two or more elements.

Question 7

Which statement describes the arrangement or properties of electrons in an atom?

Accepted Answer

The statement "The innermost orbital holds two electrons" correctly describes the arrangement of electrons in an atom. The innermost energy level can hold up to two electrons, while the subsequent energy levels can hold up to eight electrons.

Question 8

According to the atomic shell model, the second shell can hold up to ____ electrons.

Accepted Answer

The second shell can hold a maximum of 8 electrons according to the atomic shell model. The first shell can hold up to 2 electrons, while the third shell can hold up to 18 electrons. Each shell has a maximum capacity based on the number and arrangement of its subshells and orbitals.

Question 9

Match the terms with their most suitable description.
-hydrophilic

Accepted Answer

Hydrophilic molecules are polar and easily dissolve in water.

Question 10

Hydrophobic molecules are ____ water.

Accepted Answer

Hydrophobic molecules are nonpolar and do not have a charge. Therefore, they are unable to form hydrogen bonds with water molecules and are repelled by water instead of mixing with it.

Question 11

An atom of which element possesses electrons in only the first and second energy levels? (The number in parentheses indicates the number of electrons in an atom of that element.)

Accepted Answer

A neutral atom of neon has 10 electrons, distributed across the first two energy levels (2 in the first and 8 in the second). Sodium, magnesium, and chlorine all have electrons distributed across the third energy level, while argon has electrons distributed across the third and fourth energy levels.

Question 12

Match the terms with their most suitable description.
-mass number

Accepted Answer

The mass number is defined as the total number of protons and neutrons in an atom's nucleus.

Question 13

​Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description.​
-the water

Accepted Answer

The water is the solvent in this scenario because it is the substance in which the solute (table salt) is being dissolved to create a solution.

Question 14

Match the following terms with the best description.
-an atom's ability to pull electrons away from another atom

Accepted Answer

Electronegativity is the term used to describe an atom's ability to pull electrons away from another atom.

Question 15

Water is an example of a(n) ____.

Accepted Answer

Water is a compound made up of two hydrogen atoms and one oxygen atom.

Question 16

Due to their instability, free radicals ____.

Accepted Answer

Free radicals are highly reactive and unstable molecules that have an unpaired electron in their outer shell. Therefore, in order to achieve stability, they will try to donate or remove electrons from other molecules, which can cause damage to cellular components and lead to various diseases. They are not excellent solvents or buffers, and they do not readily form ionic bonds with polar ions. Although some free radicals may be used as tracers for clinical diagnostic procedures, this is not a common application.

Question 17

Match the terms with their most suitable description.
-temperature

Accepted Answer

Temperature is best described as a measure of molecular motion, indicating the kinetic energy of particles in a substance.

Question 18

Match the terms with their most suitable description.
-atomic number

Accepted Answer

The atomic number is defined as the number of protons in the atomic nucleus of an element, which determines the element's identity.

Question 19

Which chemical interactions is/are classified as true chemical bonds?

Accepted Answer

Ionic and covalent bonds are classified as true chemical bonds because they involve the sharing or transfer of electrons between atoms. Hydrogen bonds, while important for many biological processes, do not involve the transfer of electrons and are classified as a type of intermolecular force.

Question 20

Match the terms with their most suitable description.
-negative charge

Accepted Answer

A negative charge occurs when there are more electrons than protons.

Quiz 2: Lifes Chemical Basis

Match the terms with their most suitable description. -positive charge

Match the following terms with the best description. -a charged atom

Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description. -the water containing dissolved salt

Match the following terms with the best description. -separation of charge into positive and negative regions of a molecule

Match the terms with their most suitable description. -neutral

Match the following terms with the best description. -a type of molecule that has atoms of two or more elements

Which statement describes the arrangement or properties of electrons in an atom?

According to the atomic shell model, the second shell can hold up to ____ electrons.

Match the terms with their most suitable description. -hydrophilic

Hydrophobic molecules are ____ water.

An atom of which element possesses electrons in only the first and second energy levels? (The number in parentheses indicates the number of electrons in an atom of that element.)

Match the terms with their most suitable description. -mass number

Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description. -the water

Match the following terms with the best description. -an atom's ability to pull electrons away from another atom

Water is an example of a(n) ____.

Due to their instability, free radicals ____.

Match the terms with their most suitable description. -temperature

Match the terms with their most suitable description. -atomic number

Which chemical interactions is/are classified as true chemical bonds?

Match the terms with their most suitable description. -negative charge

Quiz 2: Lifes Chemical Basis

Match the terms with their most suitable description. -positive charge

Match the following terms with the best description. -a charged atom

​Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description.​ -the water containing dissolved salt

Match the following terms with the best description. -separation of charge into positive and negative regions of a molecule

Match the terms with their most suitable description. -neutral

Match the following terms with the best description. -a type of molecule that has atoms of two or more elements

Which statement describes the arrangement or properties of electrons in an atom?

According to the atomic shell model, the second shell can hold up to ____ electrons.

Match the terms with their most suitable description. -hydrophilic

Hydrophobic molecules are ____ water.

An atom of which element possesses electrons in only the first and second energy levels? (The number in parentheses indicates the number of electrons in an atom of that element.)

Match the terms with their most suitable description. -mass number

​Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description.​ -the water

Match the following terms with the best description. -an atom's ability to pull electrons away from another atom

Water is an example of a(n) ____.

Due to their instability, free radicals ____.

Match the terms with their most suitable description. -temperature

Match the terms with their most suitable description. -atomic number

Which chemical interactions is/are classified as true chemical bonds?

Match the terms with their most suitable description. -negative charge

Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description. -the water containing dissolved salt

Imagine that you are pouring some table salt (NaCl) into a glass of water and stirring it until the salt has dissolved. Given this scenario, match the following terms with the best description. -the water