Which element has atoms with only one
completely filled principal energy level?
a) as
b) p
c) n
d) sb

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

Identify the electromagnets with poles that are reversed from the electromagnet shown above