test review atoms, molecules, bonds

a substance that cannot be broken down to other substances

• compound

• matter

• element

• electron

a substance consisting of two or more different elements in a fixed ratio

• electron shells

• element

• atom

• compound

the smallest unit of matter that still keeps the properties of an element

• compound

• mixture

• nucleus

• atom

positively charged particles found in atoms

• protons

• neutrons

• electrons

• elements

electrons in the outermost energy shell of an atom that participate in bonding

• electron shells

• atomic nucleus

• valence electrons

• neutral electrons

Which of the following is an example of an element?

• hydrogen

• water

• salt

• glucose

A type of bond in which atoms are shared unequally

• hydrogen bond

• ionic bond

• polar covalent bond

• nonpolar covalent bond

What type of bond is the strongest?

• covalent

• ionic

• hydrogen

• molecule

an atom with an electrical charge resulting from gain or loss of one or more electrons.

• element

• ion

• compound

• molecule

On the periodic table, elements with the same number of valence electrons are in the same...

• square

• block

• group

• period