Question

indicate the number of protons and neutrons in copper - 65. protons 36 neutrons 36 question 6 0.5 pts provide the atomic symbol of an isotope that has seventeen protons, twenty neutrons and eighteen electrons. edit view insert format tools table 12pt paragraph b i u a 20 17ca +1

Explanation:

Step1: Recall copper's atomic number

Copper has an atomic number of 29. The atomic number is equal to the number of protons. So for copper - 65, the number of protons is 29.

Step2: Calculate number of neutrons

The mass - number of copper - 65 is 65. The mass - number is the sum of protons and neutrons. Let the number of neutrons be $n$. We have the equation $65=29 + n$. Solving for $n$, we get $n=65 - 29=36$.

Step3: Determine atomic symbol for second part

The element with 17 protons is chlorine (Cl). The mass - number is the sum of protons and neutrons, so $17+20 = 37$. The number of electrons is 18, which means the ion has a charge of - 1. The atomic symbol is $^{37}_{17}Cl^{-}$.

Answer:

For copper - 65:
protons: 29
neutrons: 36
For the isotope with 17 protons, 20 neutrons and 18 electrons:
$^{37}_{17}Cl^{-}$