Question | Answer |
Predict whether reaction will occur. If yes, write the products & balance the equation for Cr(s) + H2O(l) | no |
Predict whether reaction will occur. If yes, write the products & balance the equation for Pt(s) + O2(g) | no |
Predict whether reaction will occur. If yes, write the products & balance the equation for Cd(s) + 2HBr(aq) | yes; Cd(s) + 2HBr(aq) --> CdBr2(aq) + H2(g) |
Predict whether reaction will occur. If yes, write the products & balance the equation for Mg(s) + steam | yes; Mg(s) + 2H2O(g) --> Mg(OH)2(aq)+H2(g) |
Identify the element that replaces hydrogen from acids but cannot replace tin form its compound | Pb |
What is the most active transition metal | Mn |
The ability of an element to react is referred to as | The elements activity |
a list of elements organized according to
the ease with which the elements undergo certain chemical reactions | activity series |
For metals, greater activity means | a greater ease of loss of electrons, to form
positive ions |
For nonmetals, greater activity means | a greater ease of gain of electrons, to form negative ions |
The order in which the elements are listed is usually determined by | single-displacement reactions |
The most-active element, placed at the
top in the series, can replace each of the elements | below it from a compound in a single-displacement reaction |
activity series are based on | experiment |
Metals that react with cold H2O and acids, replacing hydrogen. React with oxygen forming oxides | Li, Rb, K, Ba, Sr, Ca, Na |
React with steam (but not cold water)and acids, replacing hydrogen. React with oxygen, forming oxides | Mg Al Mn, Zn, Cr, Fe, Cd |
React with oxygen, forming oxides | H2, Sb, Bi, Cu, Hg |
Fairly unreactive, forming oxides only indirectly | Ag, Pt, Au |