O2– has how many electrons?

eight electrons

Explanation:

Oxygen has atomic number eight. This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons. In an oxygen ion with a 2− charge, the number of protons is still 8, but the number of electrons is 10.

(İkinci cümlelerin cevaplarının altı çizilmiştir)

1. My friend didn't   remember to bring her purse.

2. She asked me, "How much money do you have in your purse?"

3.  I lent her some money.

4. There are lots of shops in the town.

5. First we went into a shop that's name was Stella's.

6. The clothes in Stella's were too expensive for us

7. We didn't buy anything in Stella's.

8. My mother's friend owns the shop next door.