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Accelerated Physical Science

Accelerated Physical Science. CRCT Chemistry Review. The elements in the periodic table are arranged from. softest to hardest acids to bases Low to high atomic numbers gases to solids.

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Accelerated Physical Science

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  1. Accelerated Physical Science CRCT Chemistry Review

  2. The elements in the periodic table are arranged from • softest to hardest • acids to bases • Low to high atomic numbers • gases to solids

  3. Carbon atoms have 6 protons and 6 neutrons in the nucleus. They also have 6 electrons outside the nucleus. What is carbon’s atomic number and atomic mass? • atomic number = 12; atomic mass = 12 • atomic number = 6; atomic mass = 18 • atomic number = 6; atomic mass =12 • atomic number = 12; atomic mass = 18

  4. Students in three different groups found the density of some coins. Each group was given four coins. Their results are shown in the table below. All of the following are valid conclusions based on the data except: • Group A’s coins were different than Group B’s. • Groups A’s coins were all the same type. • Groups B’s coins were not all the same type. • Group C’s coins were not all the same type.

  5. A hot air balloon rises because • molecules become lighter when heated • molecules move faster and farther apart when heated • molecules are less attracted by gravity when heated • molecules become charged and repel each other when heated

  6. A teaspoon of salt is dissolved in a quart of water. Which of the following is true? • The salt can be separated from the water by filtering the solution through a fine cloth. • The salt grains can be seen in the solution with a microscope. • The salt will eventually settle out. • The salt can be separated from the water by boiling off the water.

  7. If different kinds of atoms are represented by different colored dots, which picture represents a sample of a compound?

  8. Because calcium cannot be changed by simple chemical methods into two or more different substances, it is classified as • an element • a compound • a mixture • a base

  9. How many atoms are in one molecule of NH3? • 2 • 3 • 4 • 6

  10. According to the model, which is the formula for sulfuric acid? • H2OS • HS2O4 • H2SO4 • HSO3

  11. All of the following except one are made up of atoms. Which one is NOT made up of atoms • energy • people • gasoline • sodium chloride

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