Answer:
its answer A....that's the answer is

Explanation:
The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10-7 m, which is red).
Propane: 3 carbon, 8 hydrogen
Carbon dioxide: 1 carbon, 2 oxygen
Answer:
Explanation:
uestion
If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the
element?
A. An alpha particle.
Hope this helps :) ~
Answer:
The electron configuration for a
Mn3+ ion is [Ar]3d4
Explanation: