Compounds, ions

• What is the ending of an element when a metal is written first followed by a non-metal?

  'ide' - iron + oxygen = iron oxide
• What are polyatomic ions ?

  groups of atoms that carry a charge and are treated as a single unit in chemical reactions
• What is a compound?

  A substance made of two or more different types of atoms chemically bonded together.
• Are the properties of compounds the same as the properties of the original elements?

  No e.g if iron ( a lustrous magnetic metal) and Sulfur ( a yellow powder) react, the compound formed (iron sulfide) is a dull grey solid lump and doesn't behave like iron and sulfur.
• When a compound is formed from a metal and a non-metal what does it consist of?

  ions
• What are some examples of compounds that are formed by ionic bonds?

  Sodium chloride, Magnesium oxide and Calcium oxide
• How do compounds form ionically?

  The metal atoms lose electrons to form positive ions and the non-metal atoms gain electrons to form negative ions and the opposite charges attract.
• How is a compound formed by non-metals?

  It consists of molecules and each atom shares an electron with another atom ( covalent bonding )
• What are some examples of compounds formed covalently?

  Carbon monoxide, water and hydrogen chloride gas
• What are ions?

  Charged particles that have lost or gained electrons
• What happens to an atom if it gains an electron?

  It forms a negative ion
• What happens to an atom if it loses an electron?

  It forms a positive ion
• What is the product formed when iron reacts with oxygen?

  iron oxide
• What is the product formed when calcium reacts with nitrogen?

  calcium nitride
• What is the product formed when lithium reacts with sulfur?

  Lithium sulfide
• Nitrates are a type of molecular / compound ion ( Name 3 more ) ?

  Sulfate, Phosphate, Carbonate, Hydroxide