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Quizzes > Science > Chemistry

Take the Abeka Chemistry Test 8 Quiz Now!

Think you know 8th grade chemistry? Prove it with this class 8 chemistry test!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art chemistry illustration with text Try our free 8th grade Abeka Chemistry Test 8 on teal background.

Ready to boost your chemistry skills? Dive into our Abeka Chemistry Test 8 quiz - a free challenge that tests your grade 8 chemistry knowledge! This 8th grade chemistry quiz helps prep for middle school chemistry tests and covers elements to reactions. As you tackle each class 8 chemistry test question, you'll sharpen problem-solving skills and gain confidence. Feel the excitement build as you compare scores with friends, level up your prep with our 8th grade science practice test , or tackle our bonus chemistry quiz to deepen your understanding across topics. Are you ready to ace your abeka chemistry test 8? Click "Start" now and prove your chemistry prowess!

What is the smallest particle of an element that retains the chemical properties of that element?
Atom
Molecule
Compound
Electron
An atom is the smallest unit of an element that maintains its chemical identity and properties. It consists of a nucleus with protons and neutrons, surrounded by electrons. Molecules and compounds are combinations of atoms. Chemistry Explained
Which subatomic particle carries a positive electrical charge?
Proton
Neutron
Electron
Photon
Protons are positively charged particles found in the nucleus of an atom. Neutrons are neutral and electrons are negatively charged. Photons are particles of light, not subatomic components of atoms. Chemicool
What is the chemical symbol for the element sodium?
Na
S
So
N
The chemical symbol Na comes from the Latin name 'natrium' for sodium. S is sulfur, So is not an element symbol, and N is nitrogen. Chemicool
What is the chemical formula for water?
H2O
OH2
HO2
H3O
Water consists of two hydrogen atoms bonded to one oxygen atom, giving the formula H2O. OH2 is an unconventional notation, HO2 is the hydroperoxyl radical, and H3O is the hydronium ion. Chemistry Explained
How many protons are in a neutral carbon atom?
6
12
14
8
The atomic number of carbon is 6, which equals the number of protons in a neutral carbon atom. The other numbers represent atomic masses or different elements. Chemicool
Which type of chemical bond involves the sharing of electron pairs between atoms?
Covalent bond
Ionic bond
Metallic bond
Hydrogen bond
Covalent bonds form when atoms share pairs of electrons to achieve full outer shells. Ionic bonds transfer electrons, metallic bonds involve delocalized electrons, and hydrogen bonds are weak attractions between molecules. Chemistry Explained
Which group on the periodic table contains the noble gases?
Group 18
Group 17
Group 2
Group 1
Noble gases occupy Group 18 and are inert due to their full valence electron shells. Group 17 contains halogens, Group 2 alkaline earth metals, and Group 1 alkali metals. Chemicool
What pH value is considered neutral on the pH scale?
7
1
14
0
A pH of 7 is neutral, meaning equal concentrations of H3O+ and OH– ions. Values below 7 are acidic, and values above 7 are basic. Chemistry Explained
What type of reaction is represented by: 2 H2 + O2 ? 2 H2O?
Synthesis reaction
Decomposition reaction
Single replacement reaction
Double replacement reaction
A synthesis reaction occurs when two or more reactants combine to form a single product, as H2 and O2 combine to form H2O. Decomposition breaks into parts, and replacement reactions involve swapping elements. Chemistry Explained
What is the molar mass of calcium carbonate (CaCO3)?
100 g/mol
84 g/mol
60 g/mol
120 g/mol
The molar mass of CaCO3 is calculated as Ca (40.08) + C (12.01) + 3×O (3×16.00) ? 100.09 g/mol. Accurate atomic masses yield about 100 g/mol. Chemicool
Which law states that mass is neither created nor destroyed in a chemical reaction?
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Law of Conservation of Energy
The Law of Conservation of Mass asserts that total mass remains constant during a chemical reaction. Definite and multiple proportions describe compound composition, and conservation of energy applies to energy, not mass. Chemistry Explained
What is the percent composition of oxygen in carbon dioxide (CO2)?
72.7%
27.3%
50%
44%
CO2 has a molar mass of 44 g/mol (C=12, O2=32). Oxygen’s mass fraction is 32/44 × 100 ? 72.7%. The remainder is carbon’s 27.3%. Chemistry Explained
According to the reaction 2 H2 + O2 ? 2 H2O, how many moles of water are produced when 2 moles of hydrogen react completely?
2
1
3
4
Stoichiometry shows that 2 moles of H2 react with 1 mole of O2 to yield 2 moles of H2O. Therefore, 2 moles of hydrogen produce 2 moles of water. Chemistry Explained
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Study Outcomes

  1. Identify Chemical Reactions -

    Recognize different types of chemical reactions within the Abeka Chemistry Test 8 quiz and distinguish between synthesis, decomposition, single-replacement, and double-replacement processes.

  2. Classify Elements and Compounds -

    Differentiate between elements, compounds, and mixtures by analyzing their properties, enhancing your understanding of molecules featured in the 8th grade chemistry quiz.

  3. Balance Chemical Equations -

    Apply the law of conservation of mass to balance chemical equations accurately, ensuring you can adjust coefficients to represent real-world reactions.

  4. Analyze Reactants and Products -

    Determine the reactants and products in various class 8 chemistry test scenarios, improving your ability to predict reaction outcomes.

  5. Predict Chemical Behavior -

    Use your understanding of periodic trends and bonding to forecast how elements and compounds will interact under different conditions.

  6. Evaluate Formula Composition -

    Interpret chemical formulas by calculating molar masses and identifying subscripts, preparing you for more advanced middle school chemistry tests.

Cheat Sheet

  1. Basics of Chemical Reactions -

    Understanding how reactants transform into products is key for the abeka chemistry test 8. According to the American Chemical Society, a balanced chemical equation uses coefficients to represent molar ratios. For example, the combustion of methane is CH4 + 2O2 → CO2 + 2H2O, showing conserved atoms on both sides.

  2. Periodic Table Mastery -

    The periodic table is a powerful tool for predicting element behavior on your 8th grade chemistry quiz. As per the Royal Society of Chemistry, elements are organized by increasing atomic number and grouped by similar properties. A handy mnemonic for diatomic elements is "Have No Fear Of Ice Cold Beer" (H2, N2, F2, O2, I2, Cl2, Br2).

  3. Balancing Chemical Equations -

    Balancing equations ensures the same number of each atom appears on both sides, reflecting the conservation laws taught in your middle school chemistry test. Try starting with the most complex molecule and adjust coefficients to balance atoms systematically. Practice with equations like Fe + O2 → Fe2O3 to build confidence before class assessments.

  4. Ionic vs Covalent Bonding -

    Identifying bond types is crucial for the class 8 chemistry test and helps explain properties like melting point and solubility. Ionic bonds, such as in NaCl, form when electrons transfer, while covalent bonds, like in H2O, occur when electrons are shared. According to Khan Academy, electronegativity differences > 1.7 typically indicate ionic character.

  5. Law of Conservation of Mass -

    This fundamental principle, introduced in middle school chemistry, states that mass is neither created nor destroyed in a closed system. Supported by experiments dating back to Antoine Lavoisier (University of California), it's essential for verifying balanced reactions. Always weigh reactants and products in experiments to reinforce this concept for the abeka chemistry test 8.

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