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Grade 8 Periodic Table and Elements
Grade 11 Atomic Structure
Which ion has a configuration that matches the configuration of the noble gas, whose electron-dot diagram is shown below?
Electron-Dot Diagram - Argon
  1. [math]"N"^"3-"[/math]
  2. [math]"Rb"^"+"[/math]
  3. [math]"Ca"^"2+"[/math]
  4. None of the above
Grade 8 Chemistry
The diagram below shows the electron-dot diagram of potassium. What does potassium do with electrons to become stable?
Electron-Dot Diagram - Potassium
  1. It gains 1 valence electron
  2. It gains 2 valence electrons
  3. It loses 1 valence electron
  4. It loses 2 valence electrons
Grade 8 Atomic Structure
Grade 10 Properties of Matter
Which of the following is a reasonable conclusion, based on the diagram shown?
Avogadro's Law Diagram #2
  1. Argon has a greater number of gas molecules than oxygen and nitrogen do.
  2. Oxygen has a greater number of gas molecules than argon and nitrogen do.
  3. Argon, oxygen, and nitrogen all have an equal number of gas molecules.
  4. Oxygen and nitrogen both have a greater number of gas molecules than argon does.
Grade 10 Periodic Table and Elements
Which family is the following element in?
Electron-Dot Diagram - Calcium
  1. Noble gases
  2. Alkaline earth metals
  3. Alkali metals
  4. Halogens
Grade 8 Atomic Structure
The diagram represents Rutherford's Gold Foil experiment. Which statement is a conclusion that came from this experiment?
Rutherford Atomic Model #1
  1. electrons orbit the nucleus in rings at set distances
  2. the nucleus of an atom is made of protons and neutrons
  3. the probable location of electrons can be predicted using a cloud model
  4. most of an atom is empty space and its mass is concentrated in its center
Grade 10 Properties of Matter
Which of the following is found at D?
Heating Curve
  1. The freezing point
  2. The melting point
  3. The sublimation point
  4. The boiling point
Grade 10 Properties of Matter

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Grade 9 Solvents, Solutes, and Solubility
Grade 10 Properties of Matter
Assuming that the y-axis represents temperature and that the x-axis represents heat added, which of the following correctly describes this heating curve?
Heating Curve
  1. It shows changes in heat added over time in going from a gas to a liquid to a solid
  2. It shows changes in heat added over time in going from a solid to a liquid to a gas
  3. It shows changes in heat added over time involved in phase changes
  4. It shows changes in heat added over time involved in phases
Grade 9 Periodic Table and Elements
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