Chemical symbols

• What are the tiny particles that all substances are made from?

  Atoms
• What is the smallest part of an element that can exist?

  An atom
• How are atoms of each element represented?

  By their own chemical symbol
• What does a chemical symbol consist of?

  One or two letters, starting with a capital letter
• What does the symbol 'O' represent?

  An atom of oxygen
• What does the symbol 'Na' represent?

  An atom of sodium
• Why must the chemical symbol of sodium be written as 'Na'?

  Because it starts with a capital letter and the second letter is lowercase
• How many different elements are there?

  Over 100
• Where are the names and symbols of the elements shown?

  In the periodic table
• How are elements arranged in the periodic table?

  Into groups with similar properties
• How are the groups in the periodic table numbered?

  From 1 to 7, then 0
• Where are metals located in the periodic table?

  On the left of the stepped line
• Where are non-metals located in the periodic table?

  On the right of the stepped line
• What are the key features of chemical symbols?

  • Represent elements
  • Consist of one or two letters
  • Start with a capital letter
  • Second letter (if present) is lowercase
• What is the significance of the periodic table?

  • Displays names and symbols of elements
  • Arranges elements into groups with similar properties
  • Groups are numbered from 1 to 7, then 0