Which of the following elements would make a 2- ion?
A. N
B. O
C. Si
D. Mg

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Which type of fossil does this image depict?