Question

question 9 (mandatory) (1 point) listen a ¹⁶₈o²⁻ ion has ______ protons, ____ neutrons, and ______ electrons. a) 8; 8; 8 b) 8; 8; 6 c) 8; 10; 10 d) 8; 16; 8 e) 8; 8; 10 question 10 (mandatory) (1 point) listen which statement is true? as the frequency of electromagnetic radiation decreases, a) its electric field component remains constant.

Explanation:

Step1: Determine number of protons

The atomic number of oxygen is 8. The number of protons is equal to the atomic number. So, number of protons = 8.

Step2: Determine number of neutrons

The mass - number of the given oxygen ion is 16. Mass - number = number of protons+number of neutrons. So, number of neutrons = mass - number - number of protons = 16 - 8=8.

Step3: Determine number of electrons

The ion is $O^{2 - }$, which means it has a 2 - charge. A neutral oxygen atom has 8 electrons. Since it has a 2 - charge (gained 2 electrons), number of electrons = 8 + 2=10.

Answer:

E. 8; 8; 10