You can have as many controls as necessary, But they must remain equal at all times in order to get the most accurate results
Answer:
anawer is none of the above
Atoms are made up of three subatomic particles called protons, neutrons, and electrons.
Protons and neutrons are located in the nucleus.
All protons have a positive charge.
All neutrons have no charge or are neutral.
Electrons orbit around the nucleus and have a negative charge.
