Chapter 2 - The Components of Matter

ammonia molecule

ammonia molecule

Each ________ consists of 1 N atom and 3 H atoms.

Ammonia gas

________ is 14 parts N by mass and 3 parts H by mass.

atom

Elements have the following characteristics: An element is made up of only one type of ______, which is the smallest unit of an element.

17th century

Finally, in the ________, the English scientist Robert Boyle claimed that an element is defined as "simple Bodies, not created of any other Bodies, of which all mixed Bodies are compounded, and into which they are finally resolved, "a description that is very similar to our concept of an atom.

Sodium chloride

________, often known as table salt.

Mixtures

________ differ from compounds in the following ways: The components of a(n) ________ might vary in bulk.

sort of substance

Any physical or chemical approach can be used to classify a(n) ________.

Molten sodium chloride

________ is broken down into metallic sodium and chlorine gas.

component elements

Because a mixture comprises the individual units of its ________ and /or compounds on the atomic scale, the component characteristics are preserved.

Atoms

________ are the ultimate particles that comprise everything.

element

An _______ is the most basic kind of substance, possessing distinct physical and chemical characteristics.

Law of mass conservation

________: the total mass of substances does not change during a chemical reaction.