Answer:
Here is a link I made for you
http://chs.helenaschools.org/wp-content/uploads/sites/32/2018/05/2016-2017-AP-Biology-Exam-Review.docx
Explanation:
This explanes all of what you need along with helpful videos an other things I found intersting for you HOPE IT HELPS YOU YOUR WELCOME.
Explanation:
An element just has one-type atoms/atom (e.g. O2). Meanwhile, a compound is a variety of atoms (e.g. H2O).
Answer:
12, 28, 16
Explanation:
If we are trying to find mass, neutrons are our guy. 28 "mass points" means 28 neutrons. Each neutron is one point
We know there are 12 protons and electrons if we look at a table of elements, the number in the top-left is always the number of protons and we can subtract mass from the protons to get our electrons
Which of these what?
This isn't clear, can you put the answer choice or something?
It is a mixture because the compounds that make up air e.g. oxygen (o2), Carbon dioxide (co2) and the most important Nitrogen which is an element and makes up 78.09% of air are not chemically bound in the way that compounds are because they can be separated easily and there has been no change in state to any of the compounds or elements in air!hope this helpful!