Multiple Choice
When forming ions, does calcium (Ca) lose or gain electrons?
26
views
2. Atoms & Elements
Ions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the typical charge of an oxide ion formed by oxygen?
A
2+
B
1+
C
1-
D
2-
Verified step by step guidance1
Recall that oxygen is in group 16 of the periodic table and typically gains electrons to achieve a full octet, similar to the nearest noble gas configuration.
Determine the number of valence electrons oxygen has, which is 6, since it is in group 16.
Understand that to complete its octet, oxygen tends to gain 2 electrons, resulting in a total of 8 valence electrons.
Recognize that gaining 2 electrons gives the oxygen ion a charge of 2-, because electrons carry a negative charge.
Therefore, the typical charge of an oxide ion formed by oxygen is 2-.
Related Videos
Related Practice
