How many protons are in an atom of copper?
how many electrons are in an atom of copper?
how many neutrons are in an atom of copper? round
your answer to the nearest whole number.

Copper (Cu)

Neutrons‎: ‎35  Electrons‎: ‎29

Protons‎: ‎29Atomic Number‎: ‎29

Explanation:

Atomic number of copper is 29. The atomic number of an atom is determined by the number of protons in the nucleus. Therefore, there are 29 protons in an atom of copper. In a neutral atom, there are equal number of protons and electrons. Therefore, there are 29 electrons in a copper atom. Mass number of copper is 64.

Number of protons + Number of neutrons = mass number.

Therefore, number of neutrons = 63 -29 = 35

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27