Being a student of Biblical Hebrew, here's the deal.
Elohim is how its pronounced. It's a masciline plural noun. Most likely because the original Hebrews were polytheistic. It's one of the most common names for God in the Hebrew Bible. It can mean God or gods. It's used most often by itself before the fall of Adam. For example, after the fall of Adam, the word used most commonly is Yahweh Elohim.
In Biblical Hebrew heaven is a dual noun. There are three numbers of nouns in Hebrew. We are used to only singular and plural nouns in English. The dual occurs in nouns that naturally occur in pairs. For example body parts, like feet, ears and hands, are all in the dual form. Why is Heaven dual? That's an interesting theological debate.
The Church of Ishmael