Which of the following are atomic ions?
Select all that apply.
K2O
Cl-
O2-
Ca2+
is it c and a?
To determine which of the given ions are atomic ions, you need to identify the ions with a positive or negative charge resulting from the gain or loss of one or more electrons. Let's analyze each option:
K2O:
K2O represents a compound formed by the combination of potassium (K) and oxygen (O). It is not an atomic ion because it consists of multiple atoms.
Cl-:
Cl- is an atomic ion. The negative charge indicates that it has gained an electron.
O2-:
O2- is also an atomic ion. The negative charge suggests that it has gained two electrons.
Ca2+:
Ca2+ is an atomic ion as well. The positive charge indicates that it has lost two electrons.
Therefore, the atomic ions among the given options are Cl- and Ca2+. Thus, the correct answer is C and D, not C and A.