Elements with a plus one charge have the fewest valence electrons among all groups and elements in the periodic table. This includes lithium, soldium, potassium, rubidium, cesium and francium. The number of valence electrons increase from left to right. The highest number of valence electrons include the noble gases.
basic = pH>7
A. pOH = 7 - log 3.31, pH = 14 - (7 - log 3.31) = 7 + log 3.31 (basic)
B. pH = 9 - log 8.17 = 8.09 (basic)
C. pH = 4 - log 5.91 (acid)
Answer:
Explanation:
Identify all of the compounds present:
- aqueous copper(II) sulfate: we have copper charged as 2+, sulfate anion has a charge of 2-. This means the charges are balanced if we take 1 ion of each to give ;
- solid iron metal: iron metal is Fe, then including the state of iron, we have ;
- aqueous iron(II) sulfate: iron has a charge of 2+, sulfate has a charge of 2-, so the positive charge balances the negative charge to give a formula of ;
- solid copper metal: copper metal is Cu, then including the state of copper, we have .
We then have a reaction:
Answer:
can you please be more clear on your question
Which list of elements contains two metalloids?(1) Si, Ge, Po, Pb (3) Si, P, S, Cl(2) As, Bi, Br, Kr (4) Po, Sb, I, Xe
jeka94
The answer is (1). Si and Ge are both metalloids (semimetals)