Chemistry Applied Science

Question 1

What is the formula for a nitrate ion?

Answer 1

NO₃^-

Question 2

What is the formula for the carbonate ion?

Answer 2

CO₃^2-

Question 3

What is the formula for the sulfate ion?

Answer 3

SO₄^2-

Question 4

What is the formula for a hydroxide ion?

Answer 4

OH^-

Question 5

What is the formula for the

ammonium ion?

Answer 5

NH₄⁺

Question 6

What is the charge on a zinc ion?

Answer 6

Zn²⁺

Question 7

What is the charge on a silver ion?

Answer 7

Ag⁺

Question 8

What charge do the following metals have when they are ions:

H, Li, Na, K, Rb, Cs, and Fr.

Answer 8

They are all in Group 1, so they all have a +1 charge:

H⁺, Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, and Fr⁺

Question 9

What charge do the following metals have when they are ions:

Be, Mg, Ca, Sr, Ba, and Ra.

Answer 9

They are all in Group 2, so they all

have a +2 charge:

Be²⁺, Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺, and Ra²⁺.

Question 10

What is the charge on the following non-metals when they are ions:

F₂, Cl₂, Br₂, I₂, and As_2..

Answer 10

They are all in Group 7, so they all have a 1- charge.

(They need one more electron to make 8, a full outer shell).

F^-, Cl^-, Br^-, I^-, and As^-

Question 11

What is the charge on an oxygen ion?

Answer 11

Oxygen is in Group 6 so it needs 2 more electrons to make 8 for a full outer shell. Therefore it has a -2 charge: O^2-