Review Questions Flashcards
Define atom
An atom is defined as the smallest unit of matter invisible by chemical means.
A fundamental building block of a chemical element.
Atoms make up everything and are composed of protons, neutrons and electrons.
Define molecule
Molecules consist of two or more atoms bonded together.
Bonded by attractive forces known as chemical bonds.
Define crystal lattice
The symmetrical three-dimensional structural arrangements of atoms, ions or molecule (constituent particle)
inside a crystalline solid as points.
Define ion
When an atom gains or lose electrons, they become ions.
Define cation
Cations are positively charged ions.
Define anion
Anions are negatively charged ions.
Define alkali
A chemical that can dissolve in water, combine with acids to form salts, and make acids less acidic.
Subatomic particles which make up atoms
Protons
Neutrons
Electrons
Atomic number =
Atomic number = number of protons
Mass number =
Mass number = number of protons + neutrons
What is the name of this chemical
Formula: CH3COOH
Acetic acid
Name of chemical
Formula: H2SO
Sulfuric acid
Name of chemical
Formula: NaOH
Sodium hydroxide
Three indicators
Litmus
Universal indicator
Bromothymol blue
pH of pure water
7
