Chemical bonds

• What is an ionic bond?

  A bond formed between oppositely charged ions
• How is an ionic bond formed?

  By the transfer of electrons between atoms
• What do non-metals do to form anions?

  Gain electrons
• What attracts positive cations and negative anions?

  The electrostatic force of attraction
• What is ionic bonding characterized by?

  A strong electrostatic force of attraction
• What is a covalent bond?

  A bond involving the sharing of electron pairs
• Between which types of elements does covalent bonding occur?

  Between non-metals only
• What are the types of covalent bonds based on electron sharing?

  • Single bond: 1 pair of shared electrons
  • Double bond: 2 pairs of shared electrons
  • Triple bond: 3 pairs of shared electrons
• What is the representation of a double bond between nitrogen atoms?

  N≡N
• What is the representation of a single bond between hydrogen atoms?

  H-H
• What is the representation of a double bond between oxygen atoms?

  O=O
• How do the number of shared electrons relate to bond types?

  • Single bond: 1 electron from each atom
  • Double bond: 2 electrons from each atom
  • Triple bond: 3 electrons from each atom
• How many hydrogen atoms are involved in forming a hydrogen molecule?

  2 hydrogen atoms
• What is the name of the molecule formed by two hydrogen atoms?

  Hydrogen molecule