The Chemistry Of Life Quiz! Trivia Test

1. Water is made of 1 oxygen molecule and _____ hydrogen atoms.

3

2

1

5

Water is made of 1 oxygen molecule and 2 hydrogen atoms. This is because the chemical formula for water is H2O, which means there are two hydrogen atoms bonded to one oxygen atom.

Explanation

Water is made of 1 oxygen molecule and 2 hydrogen atoms. This is because the chemical formula for water is H2O, which means there are two hydrogen atoms bonded to one oxygen atom.

2. An acid has a pH below ______.

7

8

9

10

An acid has a pH below 7 because pH is a measure of the concentration of hydrogen ions in a solution. Acids release hydrogen ions (H+) when dissolved in water, which increases the concentration of H+ ions and lowers the pH value. A pH below 7 indicates an acidic solution, while a pH above 7 indicates a basic or alkaline solution.

Explanation

An acid has a pH below 7 because pH is a measure of the concentration of hydrogen ions in a solution. Acids release hydrogen ions (H+) when dissolved in water, which increases the concentration of H+ ions and lowers the pH value. A pH below 7 indicates an acidic solution, while a pH above 7 indicates a basic or alkaline solution.

3. The water molecule is _________ because there is an uneven distribution of electron within the molecule.

Uneven

Weird

Polar

Strange

The water molecule is polar because there is an uneven distribution of electrons within the molecule. This occurs because oxygen is more electronegative than hydrogen, causing the oxygen atom to pull the shared electrons closer to itself, creating a partial negative charge. The hydrogen atoms, on the other hand, have a partial positive charge. This polarity gives water its unique properties, such as its ability to dissolve many substances and its high boiling point.

Explanation

The water molecule is polar because there is an uneven distribution of electrons within the molecule. This occurs because oxygen is more electronegative than hydrogen, causing the oxygen atom to pull the shared electrons closer to itself, creating a partial negative charge. The hydrogen atoms, on the other hand, have a partial positive charge. This polarity gives water its unique properties, such as its ability to dissolve many substances and its high boiling point.

4.

A base has a ph above _____.

9

8

7

10

A base has a pH above 7 because pH measures the acidity or alkalinity of a substance on a scale of 0 to 14. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity. Therefore, a base, being alkaline in nature, will have a pH value above 7.

Explanation

A base has a pH above 7 because pH measures the acidity or alkalinity of a substance on a scale of 0 to 14. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity. Therefore, a base, being alkaline in nature, will have a pH value above 7.

5. The __________ is the smallest unit of matter.

Element

Atom

Molecule

Electron

An atom is the smallest unit of matter that retains the chemical properties of an element. It consists of a nucleus, containing protons and neutrons, surrounded by electrons. Elements are made up of atoms, and molecules are formed when atoms bond together. Electrons are subatomic particles that orbit the nucleus of an atom. Therefore, the correct answer is atom.

Explanation

An atom is the smallest unit of matter that retains the chemical properties of an element. It consists of a nucleus, containing protons and neutrons, surrounded by electrons. Elements are made up of atoms, and molecules are formed when atoms bond together. Electrons are subatomic particles that orbit the nucleus of an atom. Therefore, the correct answer is atom.

6. Gold is an example of a ______.

Molecule

Element

Atom

Covalent bond

Gold is an example of an element because it is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are made up of only one type of atom, and gold is composed solely of gold atoms.

Explanation

Gold is an example of an element because it is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are made up of only one type of atom, and gold is composed solely of gold atoms.

7. The atom is made of 3 subatomic particles. The subatomic particle found in the nucleus with a positive charge is the ___________.

Electron

Neutron

Proton

The correct answer is proton because it is the subatomic particle found in the nucleus of an atom with a positive charge. Electrons have a negative charge and are found outside the nucleus, while neutrons have no charge and are also found in the nucleus.

Explanation

The correct answer is proton because it is the subatomic particle found in the nucleus of an atom with a positive charge. Electrons have a negative charge and are found outside the nucleus, while neutrons have no charge and are also found in the nucleus.

8. An _______ bond is a bond in which electrons are transferred.

Covalent

Ionic

Double

Ionic bonds are formed when there is a complete transfer of electrons from one atom to another. This transfer occurs between a metal and a non-metal, resulting in the formation of positively charged ions (cations) and negatively charged ions (anions). The attraction between these oppositely charged ions creates the ionic bond. In contrast, covalent bonds involve the sharing of electrons between atoms, and double bonds specifically refer to the sharing of two pairs of electrons between atoms. Therefore, the correct answer is ionic.

Explanation

Ionic bonds are formed when there is a complete transfer of electrons from one atom to another. This transfer occurs between a metal and a non-metal, resulting in the formation of positively charged ions (cations) and negatively charged ions (anions). The attraction between these oppositely charged ions creates the ionic bond. In contrast, covalent bonds involve the sharing of electrons between atoms, and double bonds specifically refer to the sharing of two pairs of electrons between atoms. Therefore, the correct answer is ionic.