Science

• What is the charge of an electron?

  Negative charge
• What is the charge of a neutron?

  No charge
• Where are protons located in an atom?

  In the nucleus
• What does atomic number represent?

  The number of protons in an atom
• How is mass number defined?

  It is the total number of protons and neutrons in the nucleus
• What are isotopes?


  Atoms of the same element with different numbers of neutrons
• Give examples of isotopes of carbon.

  Carbon 12 and Carbon 14
• How many electrons can the first shell hold?

  2 electrons
• How many electrons can the second shell hold?

  8 electrons
• How many electrons can the third shell hold?

  8 electrons
• What is the charge of an electron?

  Negative charge
• What is the charge of a neutron?

  No charge
• What is the process to draw a Bohr diagram?

  1. Identify the number of protons and electrons.
  2. Place protons in the nucleus.
  3. Distribute electrons in shells according to their maximum capacity.
  4. Ensure the first shell has 2 electrons, the second has 8, and the third has 8.

  
• Where are protons located in an atom?

  In the nucleus
• What is the chemical formula for sodium chloride?

  NaCl
• What is the definition of atomic number?

  The number of protons in an atom
• What does the term 'mass number' refer to?

  The total number of protons and neutrons in the nucleus
• How does the size of an electron compare to protons and neutrons?

  An electron is tiny compared to protons and neutrons
• What is the mass of a proton in atomic mass units (a.m.u)?

  1 a.m.u
• What is the chemical formula for magnesium oxide?

  MgO
• What is the mass of a neutron in atomic mass units (a.m.u)?

  1 a.m.u
• How does the size of an electron compare to protons and neutrons?

  An electron is tiny compared to protons and neutrons
• If an atom has 6 protons, how many electrons does it have?

  6 electrons
• What are isotopes?


  Atoms of the same element with different numbers of neutrons
• Give examples of isotopes of carbon.

  Carbon 12 and Carbon 14
• What is the maximum number of electrons that can be held in each shell of an atom?

  • First shell: 2 electrons
  • Second shell: 8 electrons
  • Third shell: 8 electrons
• How would you represent the electron configuration of sodium chloride using Bohr diagrams?

  By drawing the sodium and chloride atoms with their respective electron shells
• How would you represent the electron configuration of magnesium oxide using Bohr diagrams?

  By drawing the magnesium and oxygen atoms with their respective electron shells