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Chemistry Basics Quiz

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Questions and Answers

Which subatomic particle is positively charged and located in the nucleus of an atom?

Valence electron
Neutron
Electron
Proton (correct)

What does the pH scale measure in solutions?

Concentration of protons (correct)
Volume of solutions
Density of compounds
Energy of reactions

In the chemical reaction CO₂ + H₂O → H₂CO₃, what is the role of the arrow?

Shows the type of product formed
Represents the activation energy required
Indicates the location of reactants
Signifies the transformation or yield (correct)

Which of the following best defines an enzyme?

<p>A catalyst that speeds up chemical reactions (D)</p> Signup and view all the answers

Which statement accurately describes valence electrons?

<p>They are involved in chemical bonding and reactions. (D)</p> Signup and view all the answers

Flashcards

Protons

Subatomic particles with a positive charge, found in the nucleus of an atom.

Neutrons

Subatomic particles with no charge, found in the nucleus of an atom.

Electrons

Subatomic particles with a negative charge that orbit the nucleus of an atom.

Compound

A substance formed when two or more different elements are chemically bonded together.

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Valence Electrons

Electrons in the outermost shell of an atom that are involved in chemical bonding.