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Science Concepts and Evidence

Grade 10 · On-level practice · 8 questions · Version PG-Z86ZCP-1AI3

1.

What must a balanced chemical equation conserve?A. Atoms of each element B. Protons C. 6.022 x 10^23 particles D. Ionic bond

2.

What is an isotope?A. Atoms of one element with different neutron counts B. An acidic solution C. Ionic bond D. Covalent bond

3.

What does an atomic number count?A. 6.022 x 10^23 particles B. Atoms of one element with different neutron counts C. Ionic bond D. Protons

4.

What is a mole?A. Covalent bond B. 6.022 x 10^23 particles C. Protons D. Ionic bond

5.

What happens to reaction rate when temperature usually rises?A. It increases B. An acidic solution C. Protons D. Ionic bond

6.

What type of bond shares electrons?A. Covalent bond B. It increases C. Ionic bond D. Protons

7.

What type of bond transfers electrons?A. It increases B. Ionic bond C. 6.022 x 10^23 particles D. Atoms of one element with different neutron counts

8.

What does pH below 7 indicate?A. An acidic solution B. It increases C. 6.022 x 10^23 particles D. Atoms of each element

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 11
  1. What must a balanced chemical equation conserve?Atoms of each element
  2. What is an isotope?Atoms of one element with different neutron counts
  3. What does an atomic number count?Protons
  4. What is a mole?6.022 x 10^23 particles
  5. What happens to reaction rate when temperature usually rises?It increases
  6. What type of bond shares electrons?Covalent bond
  7. What type of bond transfers electrons?Ionic bond
  8. What does pH below 7 indicate?An acidic solution

Worked example

Read the direction, identify the assessed skill, solve or cite evidence, and check the response.

Common mistake

Using a memorized procedure without checking what the question asks.

Helpful hint

Name the standard skill before answering.