Is melted sand the same as silicon dioxide and sodium oxide?

Answer 1

Simple sand is primarily just silicon dioxide.

Soda-lime glass, also called soda-lime-silica glass, is the most prevalent type of glass. Soda-lime glass is prepared by melting the raw materials, such as sodium carbonate (soda), lime, dolomite, silicon dioxide (aka silica or sand), aluminum oxide (alumina), and small quantities of fining agents (e.g., sodium sulfate, sodium chloride), so some sodium oxide might be present in the mixture.

Sodium oxide (SOX) is a chemical compound with the formula Na2O. It is used in ceramics and glasses, though not in a raw form. Treatment with water affords sodium hydroxide. Na2O + H2O → 2 NaOH

Answer 2

Melted sand is primarily composed of silicon dioxide. When sodium oxide is added to sand and melted together, it forms soda-lime glass. So melted sand is not the same as silicon dioxide and sodium oxide, but it may contain them depending on the specific composition and conditions.