Science

• What is the chemical formula for carbon monoxide?

  CO
• What elements make up carbon monoxide?

  Carbon and oxygen
• How do compounds differ from mixtures?

  Compounds have elements chemically bonded together, while mixtures do not.
• Write the word equation for the reaction between carbon and oxygen to form carbon dioxide.

  Carbon + Oxygen → Carbon Dioxide
• What are the three subatomic particles in an atom?

  • Proton
  • Neutron
  • Electron
• What is the relative charge of a proton?

  +1
• What is the relative charge of a neutron?

  0
• What is the relative charge of an electron?

  • 1
• What is the relative mass of a proton?

  1
• What is the relative mass of a neutron?

  1
• What is the relative mass of an electron?

  Very small
• What is the structure of an atom?

  • Nucleus contains protons and neutrons
  • Electrons orbit around the nucleus
  • Protons are positively charged
  • Neutrons are neutral
  • Electrons are negatively charged
• What is the periodic table?

  A table that shows all the elements.
• Approximately how many elements are there?

  118 elements
• What is an element?


  An element is a substance made up of only one type of atom.
• How can elements be represented?

  By a one or two letter symbol.
• What is the symbol for copper?

  Cu
• What are the characteristics of mixtures?

  • Mixtures are made of two or more substances
  • The substances in a mixture are not chemically bonded
  • Mixtures can be separated by physical means
• What is the smallest possible particle of an element?

  An atom
• How do atoms of different elements differ?

  Atoms of different elements have different numbers of protons.
• What is the charge of protons and neutrons?

  Protons are positively charged, and neutrons are neutral.
• What is the charge of electrons?

  Electrons are negatively charged.
• What are the subatomic particles found inside the nucleus?

  Proton and Neutron
• Which subatomic particle has a negative charge?

  Electron
• What is the formula of sulfuric acid?


  H₂SO₄
• Are the properties of a compound the same as the original elements? True or False?

  False
• What is the smaller number in a nuclear symbol called?

  Atomic number
• What does the larger number in a nuclear symbol represent?

  Mass number
• What is the sum of protons and neutrons in an atom called?

  Mass number
• What are atoms of the same element with different numbers of neutrons called?

  Isotopes
• How is the relative atomic mass of an element defined?

  It is an average value that takes account of the abundance of the isotopes of the element.
• How do you calculate the number of protons, neutrons, and electrons in an atom or ion given its atomic number and mass number?

  • Protons = Atomic number
  • Neutrons = Mass number - Atomic number
  • Electrons = Protons (for neutral atoms)
• What is the relative mass of a proton?

  1
• What is the relative mass of a neutron?

  1
• What is the relative mass of an electron?

  Very small
• What does the atomic number tell you about an atom?

  It tells you the number of protons and electrons.
• What does the mass number tell you about an atom?

  It tells you the number of protons and neutrons.
• Do all atoms of an element have the same number of protons? True or False?

  False
• What is the maximum number of electrons that can occupy the second shell of an atom?

  8
• What is the electron arrangement for the first 20 elements?


  • 1st shell: max 2 electrons
  • 2nd shell: max 8 electrons
  • 3rd shell: max 8 electrons