Practice Test GeeksPAX Exam Practice Test
← All PAX Flashcard Decks

PAX Chemistry and Physical Science Flashcards

6 cards from real PAX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 PAX Chemistry and Physical Science flashcards as text

  1. What is the atomic number of an element?

    Answer: The number of protons in the nucleus

    The atomic number equals the number of protons in an atom's nucleus and identifies the element.

  2. What type of bond is formed when electrons are shared between atoms?

    Answer: Covalent bond

    A covalent bond forms when two atoms share electrons to achieve a stable configuration.

  3. What is the pH of a neutral solution?

    Answer: 7

    A neutral solution, such as pure water, has a pH of 7; below 7 is acidic and above 7 is basic.

  4. Which state of matter has a definite volume but no definite shape?

    Answer: Liquid

    Liquids have a definite volume but take the shape of their container because their molecules can flow.

  5. What is the chemical formula for water?

    Answer: H₂O

    Water is composed of two hydrogen atoms bonded to one oxygen atom, giving it the formula H₂O.

  6. Which subatomic particle has a negative charge?

    Answer: Electron

    Electrons carry a negative charge and orbit the nucleus of an atom.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. nln.org — Eligibility, test delivery, passing score, test dates, score validity, fees, retake policy, score release, exam information · verified Oct 2026