The substance, CaSe, is used in materials which are electron emitters. What is its name?
A) calcium monoselenide
B) calcium(II) selenide
C) calcium selenide
D) calcium(I) selenide
E) calcium(II) selenium

Question

Quizplus · Accepted Answer

The correct name for CaSe is calcium selenide. The name calcium monoselenide (A) is incorrect because it implies that there are multiple possible selenides of calcium, which is not true. The name calcium(II) selenide (B) is incorrect because calcium only has a +2 oxidation state, so the roman numeral is unnecessary. The name calcium(I) selenide (D) is incorrect because calcium cannot have a +1 oxidation state in this compound. The name calcium(II) selenium (E) is incorrect because the compound is made up of calcium and selenide, not calcium and selenium.

The Substance, CaSe, Is Used in Materials Which Are Electron