Science Unit 1 lesson 2

How are the elements organized on the periodic table?

• ABC order

• Favorites first then the others

• Lightest to heaviest

• By the shape of the element

Which building block is the most basic pure substance?

• element

• atom

• molecule

• compound

Which is smaller than an element?

• Molecule

• Atom

• Compound

A group of atoms joined together is a

A pure substance that cannot be broken down into any simpler substances through chemical reactions.

• Atom

• Compound

• Molecule

• element

a substance that is formed by the chemical combination of two or more elements

• Atom

• Molecule

• Compound

• Element

the smallest unit of an element that has the properties of that element

• Atom

• Molecule

• Compound

• Element

A particle that contains more than one atoms joined together

• Atom

• Molecule

• Compound

• Element

Atoms are made up of

• Professionals, Neutrals, and Executives

• Protons, Neutrons, and Electrons

• Compounds, Molecules, and Elements

What forms when two or more atoms join together?

• Atom

• Molecule

• Element