Which is a characteristic of an Atoms

1.They come in 10 major types

2.They are smallest Unit of matter

3.They can be divided

4.They cannot combine together

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

Avariable that is not being directly tested during an experiment should be