select the correct answer from each drop - down menu. an atom has 9 electrons and 9 protons at the start. if…

select the correct answer from each drop - down menu. an atom has 9 electrons and 9 protons at the start. if it loses 2 electrons, the net charge on the atom will be. if the atom instead gains 4 electrons, the net charge will be. reset next

select the correct answer from each drop - down menu. an atom has 9 electrons and 9 protons at the start. if it loses 2 electrons, the net charge on the atom will be. if the atom instead gains 4 electrons, the net charge will be. reset next

Answer

Explanation:

Step1: Recall charge of protons and electrons

Protons have a charge of + 1 and electrons have a charge of - 1.

Step2: Calculate charge when 2 electrons are lost

Initial net - charge is (9\times( + 1)+9\times(-1)=0). After losing 2 electrons, the number of electrons is (9 - 2=7) and the number of protons is 9. Net - charge (=9\times( + 1)+7\times(-1)=9 - 7=+2).

Step3: Calculate charge when 4 electrons are gained

After gaining 4 electrons, the number of electrons is (9 + 4 = 13) and the number of protons is 9. Net - charge (=9\times( + 1)+13\times(-1)=9-13=-4).

Answer:

If it loses 2 electrons, the net charge on the atom will be + 2. If the atom instead gains 4 electrons, the net charge will be - 4.