Elements and Compounds

• it is a branch of science that deals with the properties, composition, and structure of substances


  chemistry
• anything that occupies space is

  matter
• anything that has mass and volume

  matter
• it is made up of only one kind of particles that have a fixed or constant structure


  pure substances
• pure substances are divided into two groups which are?

  elements

  compounds
• who created the PTE (periodic table of elements)

  1. Dmitri Mendeleev
  2. Albert Einstein
  3. Thomas Edison
  4. Stephen Hawking

  Dmitri Mendeleev
• how many elements did the PTE have in mendeleev's time?

  65
• predicted that there are still elements to be discovered
• it is a simplified form of matter

  elements
• contains how many kinds of atoms?

  one
• divided into?


  metals, metalloids, non metals
• how many elements are there in the pte?

  118
• how many elements are naturally occuring?

  92
• he proposed a system of chemical symbols in 1811


  jons jakob berzelius
• when arranged horizontally, it is called?

  periods
• when arranged vertically it is called?

  groups
• another word for groups?

  family
• it is the most abundant element on earth but not in the atmosphere

  oxygen
• it is a pure substance


  compound
• can be classified into

  acids or bases
• it carries nutrients to the body

  water
• it is the best preservative

  sodium chloride
• called limestone


  calcium carbonate
• acid found in the stomach

  hydrochloric acid