A. Air particles travel with sound waves.
Air has nothing to do with sound
I also took the test
Hope this helps :) Brainliest?
Answer:
because of...
Explanation:
The earth's magnetic field.
(i dont know if that is what youre looking for, but that is what i know.... hope it helps!!!)
There are
A. 6 significant figures
B.5 sig figs
C.2 sig figs
D.5 sig figs
Answer:
Part A:
Charge is 
Configuration is 
Part B:
Charge is 
Configuration is 
Part C:
Charge is 
Configuration is 
Explanation:
Monatomic ions:
These ions consist of only one atom. If they have more than one atom then they are poly atomic ions.
Examples of Mono Atomic ions: 
Part A:
For P:
Phosphorous (P) has 15 electrons so it require 3 more electrons to stabilize itself.
Charge is 
Full ground-state electron configuration of the mono atomic ion:

Part B:
For Mg:
Magnesium (Mg) has 12 electrons so it requires 2 electrons to lose to achieve stable configuration.
Charge is 
Full ground-state electron configuration of the mono atomic ion:

Part C:
For Se:
Selenium (Se) has 34 electrons and requires two electrons to be stable.
Charge is 
Full ground-state electron configuration of the mono atomic ion:
