Studied by 3 people
Atom
a basic unit of matter
Nucleus
the central core of an atom
Electron
a negatively charged particle surrounding the nucleus
Element
a pure substance; made of only one type of atom
Isotope
a form of an element consisting of the same protons, but varying neutrons; different atomic mass
Compound
one type of molecule made up of more than one element
Ionic bond
a chemical bond formed from the exchange of electrons
Ion
an atom with a positive or negative charge
Covalent bond
a kind of bond between atoms formed from shared electrons
Molecule
two or more atoms joined together; the smallest particle of a substance
Van der Waals forces
A weak attraction between molecules that is dependent on distance, geckos use this to temporarily stick on walls.
Mass number
Protons and neutrons added
Atomic mass
the weighted average of the isotopes of an element
Atomic number
the number of protons in an atom
Weak Interactions
weak forces which create a slight attraction between molecules when they are close together
Radioactive Isotopes
The nuclei of the isotope are unstable, so they will break down at a constant rate over time.
Max number of electrons in a valence shell
eight
What kind of bond does this diagram contain?
Covalent bond
Trace element
A chemical element present in a minuscule quantity
6 most common elements in living things?
carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus
99% of the human mass's elements are...
oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus
AMU
Atomic Mass Unit
Note 
Flashcard (100)