Which phrase describes a compound that consists of two elements

A compound that consist of two elements in which elements are chemically combined in a fixed proportion.

Compounds:

They are made up of two or more than two elements when combine in a fixed ratio. One compound from all sources have same same constituent ratio.

Example:

In Water or , ratio of Hydrogen and Oxygen is 2:1. If this ratio will change to 2:2 this become Hydrogen peroxide .

Water gives you life but  Hydrogen peroxide can kill you if you consume it.

Hence, we can conclude that a compound that consist of two elements in which elements are chemically combined in a fixed proportion.

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