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Free US Common Core Common Core US Chemistry
Practice Paper

8 mixed-difficulty practice questions in the style of real US Common Core Common Core papers — answers, mark-scheme-style explanations, and the official exam structure all on one page.

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What the real US Common Core Common Core US Chemistry paper looks like

Paper 1
Objective and short-answer questions covering the breadth of the specification.
Paper 2
Structured and extended-response questions testing depth of understanding.
Total exam time varies by board and tier — typically 2.5 to 3.5 hours.
Grading: See the official board specification for the current grading scale.

Mini practice paper: 6 questions

Mixed-difficulty questions from across the US Chemistry syllabus. Tap "Show answer" after each to check yourself.

Q1 · Difficulty 1/3

What are noble gases and why are they unreactive?

  1. They are very heavy metals
  2. They are elements in Group 18 with full outer electron shells, making them very stable
  3. They are radioactive gases
  4. They only exist at high temperatures
Show answer & explanation
✓ Answer: B — They are elements in Group 18 with full outer electron shells, making them very stable
Noble gases (He, Ne, Ar, Kr, Xe, Rn) have complete valence shells (full outer energy levels). This stable configuration means they rarely form bonds with other atoms.
Q2 · Difficulty 1/3

How is the periodic table organized?

  1. Randomly
  2. By increasing atomic number, with elements in groups sharing similar properties
  3. By alphabetical order
  4. By mass only
Show answer & explanation
✓ Answer: B — By increasing atomic number, with elements in groups sharing similar properties
Elements are arranged by increasing atomic number. Columns (groups) contain elements with similar chemical properties because they have the same number of valence electrons.
Q3 · Difficulty 1/3

What is a covalent bond?

  1. Transfer of electrons
  2. Sharing of electron pairs between non-metal atoms
  3. A bond in metals only
  4. An ionic bond
Show answer & explanation
✓ Answer: B — Sharing of electron pairs between non-metal atoms
Covalent bonding involves two non-metal atoms sharing one or more pairs of electrons so each atom achieves a stable electron configuration.
Q4 · Difficulty 2/3

What are valence electrons?

  1. All electrons in an atom
  2. Electrons that have been removed
  3. Electrons in the nucleus
  4. Electrons in the outermost energy level that participate in bonding
Show answer & explanation
✓ Answer: D — Electrons in the outermost energy level that participate in bonding
Valence electrons are in the outermost shell. They determine how an element bonds and its chemical reactivity. Group number often equals the number of valence electrons.
Q5 · Difficulty 2/3

What happens to electronegativity as you move across a period?

  1. It alternates
  2. It decreases
  3. It generally increases
  4. It stays the same
Show answer & explanation
✓ Answer: C — It generally increases
Electronegativity generally increases across a period (left to right) because atoms have more protons pulling on shared electrons, and decreases down a group.
Q6 · Difficulty 1/3

What is an ionic bond?

  1. A bond between two metals
  2. A weak intermolecular force
  3. Sharing of electrons
  4. Transfer of electrons from one atom to another, creating oppositely charged ions that attract
Show answer & explanation
✓ Answer: D — Transfer of electrons from one atom to another, creating oppositely charged ions that attract
In ionic bonding, a metal transfers electrons to a non-metal. The metal becomes a positive ion (cation) and the non-metal becomes a negative ion (anion). The electrostatic attraction forms the bond.
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US Common Core Common Core US Chemistry FAQ

What does the US Common Core Common Core US Chemistry exam look like?
The US Common Core Common Core US Chemistry exam is structured across 2 components. Paper 1: Objective and short-answer questions covering the breadth of the specification. Paper 2: Structured and extended-response questions testing depth of understanding. Total exam time varies by board and tier — typically 2.5 to 3.5 hours.
Can I download a free US Common Core Common Core US Chemistry past paper?
Real US Common Core past papers are published directly by US Common Core on their official website. Kramizo doesn't redistribute copyrighted past papers, but we do generate free AI-written practice papers in the exact same style — same command words, same difficulty tier, same mark conventions. Use this practice paper as warm-up, then time yourself on official past papers before exam day.
How is US Common Core Common Core US Chemistry graded?
See the official board specification for the current grading scale. Kramizo's practice questions are tagged with difficulty 1-3 mapping roughly to the lower, middle, and top grade boundaries you'll encounter in the real exam.