How many electrons does an isotope of Ca-41 have? A
21

B
61

C
41

D
20

Ca-41 has 20 electrons

The elements in nature have several types of isotopes

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Calcium is an alkaline earth metal element that is in group 2 and has the atomic number 20

The isotope of Ca-41 :

Number of protons=number of electrons=number of atoms(neutral atom)

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.