Standard Check for Understanding

If an element has 7 protons, 9 neutrons, and 8 electrons which element is it?

• Nitrogen

• Oxygen

• Fluorine

• Neon

Calculate the number of protons, neutrons, and electrons in a neutral Be (Beryllium) atom.

• 4 protons

  4 neutrons

  9 electrons

• 4 protons

  4 neutrons

  4 electrons

• 4 protons

  5 neutrons

  4 electrons

• 4 protons

  9 neutrons

  4 electrons

Which is the best description for an isotope?

• Same neutrons

  Different electrons

• Same protons

  Different electrons

• Same electrons

  Different neutrons

• Same protons

  Different neutrons

How many neutrons are in this isotope of carbon?

Which is the correct Bohr Model for Chlorine-35?

• 
• 
• 
• 

How many valence electrons are in this Bohr model?

If a substance is shiny, malleable, and conducts electricity it is a ...

• Metal

• Nonmetal

• Metalloid

Which properties would you expect a nonmetal to have?

• Shiny

  Malleable

  Good electrical conductor

• Dull

  Brittle

  Good electrical conductor

• Shiny

  Malleable

  Poor electrical conductor

• Dull

  Brittle

  Poor electrical conductor

During which step is light emitted by an atom?

• When energy is absorbed

• When the electron becomes excited

• When the electron jumps to a higher energy level

• When the electron falls back to the ground state

Why do different elements produce different colors of light?

• The frequency of the wave is different

• The wavelength is different

• The number of energy levels the electron falls is different

• The atom is a metal vs nonmetal