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Ionic and Covalent bonding

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  • Which element in MgO gains electrons?
    Oxygen
  • What is the charge on a magnesium ion when it forms an ionic compound?
    2+
  • What type of covalent bond involves three shared pairs of electrons?
    Triple bond
  • True or False: Ionic bonds form between metals and non-metals.
    True
  • Potassium reacts with oxygen. What is the formula of the compound formed?
    K₂O
  • What happens to electrons in an ionic bond?
    They are transferred from metal to non-metal.
  • Which type of covalent bond is found in nitrogen gas (N₂)?
    Triple bond
  • Ionic compounds usually have high or low melting points?
    High
  • How many bonds are in a water molecule (H₂O)?
    2 single bonds
  • Sodium (Na) has 1 valence electron. In ionic bonding, will sodium lose or gain electrons?
    Lose 1 electron
  • What is the formula of calcium chloride?
    CaCl₂
  • True or False: Covalent compounds usually conduct electricity.
    False
  • Which type of covalent bond is strongest: single, double, or triple?
    Triple
  • True or False: Covalent bonds form when atoms share electrons.
    True
  • Which type of ion is positively charged?
    Cation
  • Which compound is ionic? A) H₂O B) CO₂ C) NaCl D) CH₄
    C) NaCl
  • Which element always forms 4 covalent bonds?
    Carbon
  • What ion does chlorine (Cl) form in NaCl?
    Cl⁻ (chloride ion)
  • In NH₃, how many lone pairs does nitrogen have?
    1 lone pair
  • True or False: Ionic compounds conduct electricity when dissolved in water.
    True
  • What is the electron configuration of Na⁺?
    2,8
  • Why are noble gases generally unreactive?
    They already have full outer shells.
  • Which type of ion is formed when an atom gains electrons?
    Anion (negative ion)
  • What does the "octet rule" mean?
    Atoms try to have 8 electrons in their outer shell.
  • Which covalent molecule has the formula CO₂?
    Carbon dioxide
  • Multiple Choice: Which is a covalent compound? A) NaCl B) H₂O C) MgO D) CaCl₂
    B) H₂O
  • Lithium and fluorine bond. What is the formula of the compound?
    LiF
  • Covalent bonds usually form between what types of elements?
    Two non-metals
  • Which type of ion is negatively charged?
    Anion
  • What type of covalent bond involves two shared pairs of electrons?
    Double bond
  • Oxygen (O₂) is an example of what type of bond?
    Double bond
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