The first ionization energy of calcium is smaller than that of strontium.
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Q5: A magnesium fire can always be extinguished
Q6: An amphoteric substance acts as an acid
Q7: The formula for barium superoxide is BaO2.
Q8: Hydrogen peroxide may act only as an
Q9: Which of the following is INCORRECT?
A reaction
Q11: In a nonmetal hydroxide the oxygen-hydrogen bond
Q12: Which of the following is uncharacteristic of
Q13: The chemistry of Be is different from
Q14: Strontium hydroxide is more soluble in water
Q15: Which of the following statements about the
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