Examlex
Identify by number (1A-8A) the main group of the periodic table to which the described element (X) belongs, in each of the following cases.
a. X commonly forms the ion X2-.
b. X reacts with water according to the equation
X(s) + 2H2O(l) → X(OH)2(aq) + H2(g)
c. X exists as molecules, X2; its hydride has the formula HX.
d. X is a metal which reacts with oxygen to produce the peroxide, X2O2.
Q2: What are the possible complications of a
Q5: John Anderson is a 54-year-old executive who
Q16: What factors predispose to arterial thrombosis?
Q19: Indicate whether the following statement are true
Q29: Development of a positive (higher than atmospheric)
Q33: Indicate whether the following statement are true
Q35: The process of converting metal sulfides to
Q49: What is the name of the following
Q63: In complexes of transition metals, the maximum
Q95: Volatile impurities are removed from ores by