Question

strontium oxide was used in the glass screens of cathode - ray tube (crt) televisions before the invention of flat - screen televisions. write the chemical formula of strontium oxide. refer to a periodic table and a list of polyatomic ions.

Explanation:

Step1: Determine strontium ion

Strontium (Sr) is in group 2 of the periodic table, so it forms a $Sr^{2 +}$ ion by losing 2 electrons.

Step2: Determine oxide ion

Oxygen (O) is in group 16, and forms an $O^{2 -}$ ion by gaining 2 electrons.

Step3: Write chemical formula

To form a neutral compound, the charges must balance. One $Sr^{2+}$ and one $O^{2 -}$ combine, so the chemical formula is SrO.

Answer:

SrO