Group 2

    Cards (100)

    • What are the elements in Group 2 called?
      Alkaline Earth Metals
    • How many electrons do Group 2 elements have in their outermost shell?
      Two electrons
    • What charge do Group 2 metals form when they become ions?
      +2 charge
    • Why do Group 2 metals become more reactive down the group?
      It becomes easier to lose two electrons
    • What happens to the first and second ionization energies as you go down Group 2?
      They decrease
    • What is the first ionization energy?
      Energy needed to remove the first outer electron
    • What effect does increased shielding have on ionization energy?
      It decreases ionization energy
    • How does the atomic radius change going down Group 2?
      It increases
    • What happens to the melting point of Group 2 elements as you go down the group?
      It decreases
    • What is the anomaly in the melting point trend of Group 2 elements?
      Magnesium has a different melting point
    • How does density change down Group 2?
      Density drops then increases
    • What happens to the alkalinity of solutions formed from Group 2 hydroxides as you go down the group?
      It increases
    • What is the solubility trend of Group 2 hydroxides?
      Increases going down the group
    • What is the general formula for Group 2 hydroxides?
      X(OH)₂
    • What happens to the solubility of Group 2 sulfates as you go down the group?
      It decreases
    • What is the formula of the ion formed by radium (Ra)?
      Ra²⁺
    • What is the formula for radium oxide?
      RaO
    • How does the first ionization energy of radium compare to barium?
      Radium's is lower than barium's
    • Why is radium more reactive than barium?
      Its outermost electrons are further away
    • How does the pH of radium hydroxide solution compare to calcium hydroxide?
      Radium hydroxide has a higher pH
    • What is the solubility of radium sulfate compared to strontium sulfate?
      Radium sulfate is less soluble
    • What is the general equation for the reaction of Group 2 oxides with dilute hydrochloric acid?
      XO + 2HCl → XCl + H₂O
    • What is formed when radium hydroxide solution is mixed with dilute sulfuric acid?
      A white precipitate of radium sulfate
    • What do Group 2 elements react with?
      Oxygen, water, and dilute acids
    • What color flame does barium produce when burned?
      Green flame
    • What is the general equation for the reaction of Group 2 metals with water?
      M + 2H₂O → M(OH)₂ + H₂
    • Which Group 2 metal does not react with water?
      Beryllium (Be)
    • What is the reaction of magnesium with cold water?
      Extremely slow reaction
    • How do the reactions of Group 2 metals with water and oxygen differ?
      Water reactions produce hydroxides, oxygen produces oxides
    • What is the general trend in the reactivity of Group 2 metals with dilute acids?
      They react vigorously
    • What is the observation when magnesium reacts with dilute hydrochloric acid?
      Bubbles of hydrogen gas are produced
    • What happens to the reactivity of Group 2 metals with oxygen as you go down the group?
      It increases
    • What are the elements in Group 2 called?
      Alkaline earth metals
    • How many electrons are in the outermost principal quantum shell of Group 2 elements?
      Two
    • Why do Group 2 metals become more reactive going down the group?
      It becomes easier to remove the outer two electrons as the atomic radius increases
    • What happens to the atomic radius of Group 2 elements going down the group?
      It increases
    • What happens to the melting point of Group 2 elements going down the group?
      It decreases
    • What happens to the density of Group 2 elements going down the group?
      It decreases and then increases
    • Why do the solutions formed from the reaction of Group 2 oxides with water become more alkaline going down the group?
      The solubility of the Group 2 hydroxides increases going down the group, increasing the concentration of OH- ions
    • What happens to the solubility of Group 2 sulfates going down the group?
      It decreases
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