Unlock hundreds more features
Save your Quiz to the Dashboard
View and Export Results
Use AI to Create Quizzes and Analyse Results

OR
Sign inSign in with Facebook
Sign inSign in with Google
Quizzes > Science > Chemistry

Basics of Chemistry Quiz: Test Your Fundamentals and Ace It!

Think you know basic chemistry test questions? Start this fundamental chemistry quiz now!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art cutouts of beakers test tubes molecules and atoms beneath Basics of Chemistry Quiz text on sky blue background

Excited to dive into the elements and reactions that make up our world? This Basics of Chemistry Quiz is your free gateway to understanding the core principles behind molecules, atoms, and compounds. Perfect for students, hobbyists, and aspiring scientists, this fundamental chemistry quiz tests your grasp on everything from the periodic table to chemical bonds. You'll challenge yourself with targeted chemistry basics questions, then fine-tune your knowledge with a hands-on basic chemistry questions session. Ready to prove your prowess? Take on the ultimate chemistry quiz now, tackle the chemistry fundamentals challenge, and ace every basic chemistry test with confidence!

What does the atomic number of an element represent?
Number of protons
Number of neutrons
Total electrons
Sum of protons and neutrons
The atomic number uniquely identifies an element by the number of protons in its nucleus. In a neutral atom, this also equals the number of electrons. Neutrons contribute to mass but not to the atomic number. Learn more
In which state of matter do particles have a fixed volume but take the shape of their container?
Solid
Liquid
Gas
Plasma
Liquids have a definite volume but no fixed shape, so they conform to the shape of their container. Solids have both fixed volume and shape. Gases and plasmas have neither fixed volume nor shape. Learn more
Which part of a chemical formula indicates the number of atoms of an element present?
Coefficient
Subscript
Superscript
Prefix
Subscripts in a chemical formula specify the number of atoms of each element in a molecule. Coefficients show the number of molecules. Superscripts are used in ions to denote charge. Learn more
What type of chemical bond involves the sharing of electron pairs between atoms?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Covalent bonds form when atoms share pairs of electrons to achieve stable electron configurations. Ionic bonds involve complete transfer of electrons. Metallic bonds share electrons in a delocalized 'sea'. Learn more
What is the molar mass of water (H2O)?
18 g/mol
16 g/mol
20 g/mol
34 g/mol
Water’s formula H2O has two hydrogen atoms (1 g/mol each) and one oxygen atom (16 g/mol). Summing these yields a molar mass of 18 g/mol. Learn more
Which of the following is a homogeneous mixture?
Salt water
Granite
Oil and vinegar
Sand in water
A homogeneous mixture has uniform composition throughout, like salt dissolved in water. Granite and sand in water are heterogeneous mixtures with visible phases. Oil and vinegar separate into layers. Learn more
At 25°C, what is the pH of a neutral aqueous solution?
7
14
0
1
At 25°C, pure water undergoes autoionization to yield equal concentrations of H? and OH? ions at 1×10?? M, giving a pH of 7. Lower pH values are acidic, higher are basic. Learn more
How many valence electrons does a neutral carbon atom have?
2
4
6
8
Carbon is in group 14 of the periodic table and has four valence electrons available for bonding. The remaining electrons occupy lower energy levels. Learn more
Which gas law states that pressure and volume of a gas are inversely proportional at constant temperature?
Charles's law
Boyle's law
Avogadro's law
Dalton's law
Boyle’s law describes the inverse relationship between pressure and volume for a fixed mass of gas at constant temperature (P1V1 = P2V2). Charles’s law involves volume and temperature. Learn more
What is the empirical formula of glucose (C6H12O6)?
C6H12O6
CH2O
C2H4O2
CHO
The empirical formula reduces the subscripts to the smallest whole-number ratio: C6H12O6 becomes CH2O. It represents the simplest ratio of elements. Learn more
Which element has the highest electronegativity on the Pauling scale?
Oxygen
Nitrogen
Fluorine
Chlorine
Fluorine is the most electronegative element on the Pauling scale (3.98), making it the strongest attractor of bonding electrons. Oxygen ranks second. Learn more
An isotope has a mass number of 18 and 8 protons. What is its chemical symbol?
O-16
O-17
O-18
F-18
The number of protons (8) identifies oxygen, and the mass number (18) gives O-18. Isotopes share protons but differ in neutrons. Learn more
In thermochemistry, the standard enthalpy change of a reaction (?H°) is calculated as:
??Hf°(reactants) ? ??Hf°(products)
??Hf°(products) ? ??Hf°(reactants)
?H°products × ?H°reactants
??Gf°(products) ? ??Gf°(reactants)
Standard enthalpy change equals the sum of standard enthalpies of formation of products minus those of reactants. This reflects energy change under standard conditions. ?G values are for free energy, not enthalpy. Learn more
Which best describes a buffer solution?
A solution that changes color with pH
A solution that completely neutralizes added acids
A solution that resists changes in pH when small amounts of acid or base are added
A solution containing only a strong acid
A buffer is a mixture of a weak acid and its conjugate base (or vice versa) that resists pH change upon addition of small amounts of acid or base. It maintains pH by neutralizing added H? or OH?. Learn more
In a redox reaction, the species that loses electrons is known as the:
Oxidizing agent
Reducing agent
Catalyst
Electrolyte
The reducing agent donates (loses) electrons and is oxidized in the process. The oxidizing agent gains those electrons and is reduced. Catalysts speed reactions without being consumed. Learn more
For the reaction aA + bB ? cC + dD, the equilibrium constant expression K is:
([C]^c [D]^d) / ([A]^a [B]^b)
([A]^a [B]^b) / ([C]^c [D]^d)
[C][D] / [A][B]
([A]^c [B]^d) / ([C]^a [D]^b)
The equilibrium constant expression is the product of product concentrations raised to their stoichiometric coefficients divided by that of reactants raised to theirs. It applies to gases or solutions. Learn more
According to Le Chatelier’s principle, when pressure on a gaseous equilibrium is increased, the system shifts toward the side with:
More moles of gas
Fewer moles of gas
Equal moles of gas
No shift occurs
Le Chatelier’s principle states the system counteracts the change; increasing pressure favors the side with fewer gas moles to reduce pressure. The opposite occurs when pressure is decreased. Learn more
What is the SI unit for the rate constant k of a second-order reaction?
L·mol?¹·s?¹
s?¹
mol·L?¹·s?¹
L·s?¹
For a second-order rate law (rate = k[A]²), k must have units that yield concentration/time: (L·mol?¹·s?¹). First-order reactions use s?¹. Learn more
What is the maximum number of electrons that can occupy a d-subshell?
6
10
8
2
A d-subshell contains five d-orbitals, each of which can hold two electrons, for a total of 10 electrons. This follows the (2n²) rule for subshell capacity. Learn more
In molecular orbital theory, when two atomic orbitals combine in phase, they form a:
Antibonding molecular orbital
Bonding molecular orbital
Nonbonding orbital
Hybrid orbital
In-phase overlap of atomic orbitals increases electron density between nuclei, creating a bonding molecular orbital that stabilizes the molecule. Out-of-phase overlap produces antibonding orbitals. Learn more
Given ?H = ?40 kJ and ?S = ?100 J/K, what is ?G at 298 K?
-10.2 kJ
-69.8 kJ
10.2 kJ
69.8 kJ
?G = ?H ? T?S. Converting ?S to kJ/K gives ?0.100 kJ/K, so ?G = ?40 kJ ? (298 K × ?0.100 kJ/K) = ?40 + 29.8 = ?10.2 kJ. A negative ?G indicates spontaneity. Learn more
0
{"name":"What does the atomic number of an element represent?", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"What does the atomic number of an element represent?, In which state of matter do particles have a fixed volume but take the shape of their container?, Which part of a chemical formula indicates the number of atoms of an element present?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}

Study Outcomes

  1. Understand Atomic Structure -

    By engaging with the basics of chemistry quiz, you'll identify atomic components and their roles in determining element behavior.

  2. Analyze Chemical Bonds -

    Use chemistry basics questions to differentiate ionic, covalent, and metallic bonds and explain how electrons are shared or transferred.

  3. Predict Reaction Mechanisms -

    Through our fundamental chemistry quiz, you'll learn to foresee reactant-product relationships and balance chemical equations accurately.

  4. Apply Stoichiometry Principles -

    Apply stoichiometry skills on a basic chemistry test format to calculate molar ratios, concentrations, and yields in reactions.

  5. Solve Chemistry Basics Questions -

    Enhance problem-solving by tackling diverse chemistry basics questions covering periodic trends, molecular structures, and more.

  6. Evaluate Your Chemistry Fundamentals -

    Track your progress in this chemistry fundamentals challenge to pinpoint strengths and address areas needing improvement.

Cheat Sheet

  1. Atomic Structure Fundamentals -

    Review the composition of the atom: protons (+), neutrons (0) and electrons ( - ). Remember the mass number equals protons plus neutrons, and use the mnemonic "Protons are Positive" to keep charges straight (source: IUPAC).

  2. Periodic Table Organization -

    Understand how elements are arranged by increasing atomic number in periods (rows) and by similar properties in groups (columns). A handy tip for your basics of chemistry quiz: "Across is increase, Down is family" to recall trends in atomic radius and electronegativity (source: Royal Society of Chemistry).

  3. Chemical Bond Types -

    Differentiate ionic (transfer of electrons), covalent (sharing electrons) and metallic bonds (delocalized electrons). For example, NaCl forms an ionic lattice while Hâ‚‚O features polar covalent bonds - know the octet rule and examples (source: Khan Academy).

  4. Balancing Equations & Stoichiometry -

    Apply the law of conservation of mass by ensuring atom counts match on both sides of an equation (e.g., 2H₂ + O₂ → 2H₂O). Practice with a basic chemistry test question on molar ratios to master stoichiometric calculations (source: American Chemical Society).

  5. Acids, Bases & the pH Scale -

    Identify strong versus weak acids/bases and use the pH scale (0 - 14) to classify solutions. A useful mnemonic for chemistry basics questions is "pH less than 7: Acid, equals 7: Neutral, greater than 7: Base" (source: IUPAC).

Make a Quiz (FREE) Copy & Edit This Quiz Create a Quiz with AI

Chemistry Quizzes

Powered by: Quiz Maker