Water Chemistry Trivia Quiz!

15 Questions | By Rhaveno | Last updated: Mar 22, 2022 | Total Attempts: 191

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What is water chemistry? This quiz may be a challenge for a beginner in chemistry, but it is worth a try. Water is an inorganic, transparent, odorless, tasteless, and almost colorless chemical substance. Water is essential for living, as every organism needs water. The chemical composition of water is H20, which means that each of its molecules contains one oxygen and two hydrogen atoms. This quiz will help you understand the chemistry of water.

Questions and Answers

1.

Identify the statement that is correct about the number of protons and electrons in an atom:
- A.
  
  The number of protons and the number of electrons in an atom are always equal.
- B.
  
  The number of protons is always greater than the number of electrons in an atom.
- C.
  
  The number of protons is always less than the number of electrons in an atom.
- D.
  
  The number of protons and electrons equals the mass of an atom.
2.

Choose the statement that best explains: Why do hydrogen atoms usually exist as molecules, H2?
- A.
  
  Hydrogen has an atomic number of one and is unsatisfied when the outermost orbital is unfilled. A hydrogen molecule of two hydrogen atoms is more stable than two individual hydrogen atoms
- B.
  
  Hydrogen has an atomic number of two and does not need to share
- C.
  
  Hydrogen usually combines with other atoms to form covalent bonds
- D.
  
  Hydrogen has one proton and is in search of one neutron
3.

This diagram represents H_2. What does the H₂symbol mean?
- A.
  
  The H2 symbol represents two atoms of Hydrogen.
- B.
  
  The H2 symbol represents a Hydrogen atom.
- C.
  
  The H2 symbol represents a water molecule.
- D.
  
  The H2 symbol represents an ionic bond.
4.

In this diagram, the e- represents:
- A.
  
  The e- represents the covalent Hydrogen electron bond in this Hydrogen molecule.
- B.
  
  The pair of e- represents the double covalent Hydrogen electrons in the Hydrogen molecule.
- C.
  
  The pair of e- represents the ionic Hydrogen electrons in this Hydrogen molecule.
- D.
  
  The e- represents the single shared Hydrogen electron in this Hydrogen molecule.
5.

The number of _______________ determines what element it is and its chemical behavior.
- A.
  
  The number of protons determines what element it is and its chemical behavior.
- B.
  
  The number of neutrons determines what element it is and its chemical behavior.
- C.
  
  The number of protons and neutrons determines what element it is and its chemical behavior.
- D.
  
  The number of electrons determines what element it is and its chemical behavior.
6.

What is an atom's atomic number?
- A.
  
  An atom's atomic number is the number of protons in the nucleus of an atom.
- B.
  
  An atom's atomic number is the number of the protons and neutrons of the atom.
- C.
  
  An atom's atomic number is the number of valence electrons.
- D.
  
  An atom's atomic number is the atom's electronegativity.
7.

Why are elements made up of identical atoms?
- A.
  
  The atoms of an element are identical because they are the tiniest part of an element that has all the properties of that one element and therefore must be identical.
- B.
  
  The atoms of an element are made up of identical atoms because they bond together.
- C.
  
  The atoms of an element are made up of identical atoms because they share electrons.
- D.
  
  The atoms of an element are made up of identical atoms because they have the same amount of atomic mass.
8.

Which statement about subatomic particles is correct?
- A.
  
  Protons have a positive charge. Neutrons are not charged. Electrons have a negative charge.
- B.
  
  Protons have a no charge. Neutrons have a positive charge. Electrons have a negative charge.
- C.
  
  Protons have a negative charge. Neutrons are not charged. Electrons have a positive charge.
- D.
  
  Protons have a positive charge. Neutrons have a negative charge. Electrons have no charge.
9.

All of these statements about electrons are true except one. Which statement about electrons is false?
- A.
  
  Electrons are negatively charged subatomic particles.
- B.
  
  Electrons move in an orbit around the nucleus of an atom.
- C.
  
  The innermost shell of an electron orbit fills with 2 electrons. The outermost electrons are called valence electrons.
- D.
  
  The number of electrons determines the atomic number of an atom
10.

The sum of an atom's neutrons and protons is equal to the atom's ___________
- A.
  
  Atomic mass
- B.
  
  Atomic number
- C.
  
  Electronegativity
- D.
  
  Valence electrons
11.

Choose the response that best explains:Why is water considered a polar molecule?
- A.
  
  In a water molecule, the atom of Oxygen has a slight negative charge (-), each atom of Hydrogen has a slight positive charge (+). A molecule of water has oppositely charged ends.
- B.
  
  In a water molecule, the atom of Oxygen has a slight positive charge (+), each atom of Hydrogen has a slight negative charge (-). A molecule of water has oppositely charged ends.
- C.
  
  In a water molecule, the atom of Oxygen has a neutral charge, each atom of Hydrogen has one each of a positive ( +) and (-) negative charge. A molecule of water has oppositely charged ends.
12.

What is a chemical bond?
- A.
  
  A chemical bond is the force that holds atoms together.
- B.
  
  A chemical bond is the nucleus energy level that holds atoms together.
- C.
  
  A chemical bond is the exchange of valence electrons.
- D.
  
  A chemical bond is the pairing and sharing of electrons.
13.

Covalent bonds happen when____________
- A.
  
  Atoms share paired electrons.
- B.
  
  Atoms trade paired electrons.
- C.
  
  Atoms lose a pair of electrons.
- D.
  
  Atoms give an electron to another atom.
14.

Atoms are most stable when____________
- A.
  
  There outermost orbitals are filled.
- B.
  
  There is an equal number of neutrons and protons.
- C.
  
  Their electrons are in the cloud.
- D.
  
  There is an equal number of electrons and neutrons.
15.

What is electronegativity?
- A.
  
  How many electrons are in a valence and how quickly they orbit the nucleus.
- B.
  
  The strength of an atoms' electrons because of the amount of pull that one atom has on the electrons that it shares with other atoms.
- C.
  
  The electrical charge of a polar molecule.
- D.
  
  The exchange of electrons in ionic bonding.