Chapter 2 Flashcards
(25 cards)
Atoms
Tiny particles that compose elements
Elements
Fundamental substances that compose matter
Molecule
When 2 or more atoms Bond
Ions
Atoms that gain or lose electrons
What an atom consists of ?
Protons - positive electrical charge
Neutrons - neutral charge - uncharged
Electrons -negative electrical charge
An atoms mass
Determined by number of protons and neutrons in its nucleus
Atomic number
Number of protons in an atom
Atomic weight
Number of protons and neutrons in its nucleus
When an elements atom have nuclei containing some number of protons but different neutrons (may or may not be radioactive )
Isotope
Molecules
Any chemical structure that consists of atoms held together by covalent bonds (involving the sharing of electrons between atoms )
Compound molecule
When 2 or more atoms of a different kind bond they form a compound molecule
3 types of mixtures
Colloids
Solutions
Suspensions
Matter
Liquids gases and solids both inside and outside the human body takes up space and weight
Colloids
Also called emulsion
Heterogenous
Milky /translucent
Sol gel transformation
Solutions
Homogenous mixture
Solute
Present in solution smallest amount
Solvent
Present in solution largest amount
Suspension
Heterogenous mixture
In the body they do not settle due to blood circulation
Ionic bonds
They form between ions
Electron acceptor
Atom gaining 1 or more electron
Ions that require a net positive change
Cations
Ions that require a net negative charge
Anions
3 types of chemical bonds
Ionic
Covalent
Hydrogen
Involves the sharing of electrons between atoms
Covalent
