He always buys cheap things, so in the end, it becomes 'penny wise and pound foolish'.

Sandwich compounds are being studied in a branch of chemistry.

Aluminum is an amphoteric oxide, it reacts with both acids and bases.

Acidic oxides react with water to produce acids.

Peroxides play an important role in chemical reactions.

In this situation, the proverb 'it is best to submit to circumstances' applies.

I will participate in an obstacle race this weekend.

In this chemistry experiment, we will learn about the dangers of cyanide compounds.

Basic oxides react with acids to produce salt and water.

This area is affected by radioactive fallout from past nuclear tests.