Atoms, Elements, Molecules, and compounds Flashcards
Atoms
The smallest particle of an element that can exist
Element
A pure chemical substance that cannot be physically split into a more simple substance. Each is made of one type of atom. Carbon, mercury and hydrogen are some examples
Molecule
the smallest particle of a substance that exists. it is composed of two or more atoms
compound
a substance made of atoms from two or more elements
Proton
A particle of matter that has a positive electrical charge and forms part of the nucleus of an atom
Neutron
A particle of matter that has no electrical charge and forms part of a atom
Electron
A particle of matter that has a negative electrical charge and travels around an atom
Atomic number
Number of protons top number in the elemental box
Mass number
Number of protons plus neutrons bottom number in the element box
Chemical symbol
one or two letters representing an element
Subscript
Tiny number to the right of the element symbol tells you how many atoms of that element
Golgi Complex
Modifies and packages proteins & carbs into membrane bound vesicles for export