Answer:
20 electrons
Explanation:
The atomic number equals the amount of protons in an atom's nucleus, but this number is also equal to the amount of electrons. So if the atomic number is 20, that means there are 20 protons and 20 electrons. ( they need to balance out since they have opposite charges)
I hope that helps :)
Answer:
Explanation:
Given:
we know the values of
Formula:
rearranging the formula and substituting values
Answer: D:wavelenght
Explanation: Students will understand that shorter wavelengths have higher frequency and energy.