Definitions
What is an Atom?
Smallest identifiable unit of an element.
What is an ion?
An atom with a higher or lower electrical charge.
What model is widely accepted for atoms?
Plum pudding model.
What is the law of Conservation of Mass?
In a chemical reaction, mass is neither created nor destroyed.
What is a cation?
Positively charged ion.
Where is most of the mass in an atom located?
In the nucleus.
What is the atomic theory?
All matter is composed of atoms.
What is an anion?
Negatively charged ion.
True or False? Electrons are negative.
False. True are negatively charged particles.
What is the law of multiple proportions?
When 2 elements are combined they can be represented as a ratio of small whole numbers.
What is the Plum Pudding Model?
The model that is widely accepted for atoms.
True or False? Most atoms are electrically neutral.
True. For the most part protons and electrons have a 1:1 ratio.
What is an isotope?
Atoms with the same number of protons and electrons but a different number of neutrons.
True or False? The number of neutrons affects the size of the atom.
False. The neutrons have no impact on an atom's size or mass.
What are the three subatomic particles?
Proton, neutron, and electron.