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Which compound is a molecule?

Which compound is a molecule?

All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

Which substances are molecules?

Molecules as components of matter are common. They also make up most of the oceans and atmosphere. Most organic substances are molecules. The substances of life are molecules, e.g. proteins, the amino acids they are made of, the nucleic acids (DNA & RNA), sugars, carbohydrates, fats, and vitamins.

How many types of molecules are there?

There are three types of molecules which are the element molecule, the compound molecule & the mixture.

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What are the properties of a molecule?

The three main properties of a molecular substance include: low melting points, or a temperature that indicates when a solid substance changes to a liquid; and boiling points, or a temperature that indicates the point at which a liquid changes to a gas, or vapor; poor conductivity; and low solubility, which is a …

What are physical properties of a molecule?

Physical Properties and Intermolecular Forces

Property Ionic Compounds Molecular Compounds
Physical state at room temp. solid gas, liquid, or solid
Water solubility usually high variable
Melting and boiling temps generally high generally low
Electrical conductivity good when molten or in solution poor

Who gave definition of element?

The word element was first given by Rebert Boyle. It is defined as the simplest chemical substance that cannot be broken down during a chemical reaction.

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Who defines the first element?

Chemical element was first presented by the English scientist Robert Boyle. He defined an element as a substance “incapable of decomposition” and like a true scientist added the prophetic by any means with which we are now acquainted. Boyle’s definition comes admirable close to present day theory.