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Science Concepts and Evidence

Grade 10 · Stretch challenge · 8 questions · Version PG-14EVTRB-19D7

1.

What does pH below 7 indicate?A. Atoms of one element with different neutron counts B. Ionic bond C. Protons D. An acidic solution

2.

What type of bond transfers electrons?A. Ionic bond B. Covalent bond C. Protons D. An acidic solution

3.

What must a balanced chemical equation conserve?A. Atoms of each element B. 6.022 x 10^23 particles C. Atoms of one element with different neutron counts D. It increases

4.

What is a mole?A. 6.022 x 10^23 particles B. Ionic bond C. Covalent bond D. Atoms of each element

5.

What type of bond shares electrons?A. Covalent bond B. Ionic bond C. Atoms of one element with different neutron counts D. An acidic solution

6.

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

7.

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

8.

What is an isotope?A. 6.022 x 10^23 particles B. Atoms of one element with different neutron counts C. Covalent bond D. An acidic solution

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 17
  1. What does pH below 7 indicate?An acidic solution
  2. What type of bond transfers electrons?Ionic bond
  3. What must a balanced chemical equation conserve?Atoms of each element
  4. What is a mole?6.022 x 10^23 particles
  5. What type of bond shares electrons?Covalent bond
  6. What happens to reaction rate when temperature usually rises?It increases
  7. What does an atomic number count?Protons
  8. What is an isotope?Atoms of one element with different neutron counts

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.