I got a different answer for #2
(2) 2, is your answer. The Balmer and Lyman series releases different frequencies of the hydrogen atom energy emissions.
False. What actually determines the properties of elements are the electrons, or aka valence electrons. They are used to bond, which determines its properties.
The city monitors the steady rise of CO from various sources annually. In the year "C: 2019"<span> (rounded off to the nearest integer) will the CO level exceed the permissible limit.
If this isn't the answer, let me know and i'll figure out what it is. But I believe this is it. :) </span>