Numărul atomilor de oxigen dintr-o moleculă de trioxid de sulf SO3 este
5 points
4
3
2

3  

Explanation:

A molecule of sulfur trioxide contains three oxygen atoms.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

It would be true sodium reacts with water in a violent way