Question

write the formula for the following covalent compound: selenium hexachloride

Explanation:

Step1: Identify elements and prefixes

Selenium (Se) has no prefix (implies 1), hexachloride means 6 chlorine (Cl) atoms.

Step2: Combine elements

Use the element symbols and the number of atoms. Selenium is 1, chlorine is 6.

Answer:

$\ce{SeCl_{6}}$