Biochemical Unit 4 Flashcards
The smallest portion of an element
Atom
The center part of an atom that contains protons and neutrons
Nucleus
A particle in an atom found in the nucleus that has a positive electrical charge
Proton
A particle in an atom found in the nucleus that has no electrical charge
Neutron
A particle in an atom that has a negative electrical charge
Electron
Substance that cannot be separated into a simpler substance, examples: Carbon, oxygen, gold
Element
An orderly of elements based on their atomic numbers
Periodic table
An element’s position in the periodic table based on (and equal to) the number of protons it has in its nucleus
Atomic number
Anything that has mass and occupies space
Matter
Atoms of the same element that had different numbers of neutrons in the nucleus
Isotopes
The mass contained in an element nucleus, which is equal to the number of protons plus the number of neutrons.
Atomic Mass
The distance the electrons travel around the nucleus of an atom
Electron energy level
A chemical combination of two or more atoms or elements
Chemical compound
Process that occurs when one substance is changed into another
Chemical reaction
An elements ability or tendency to combine with another element
Reactivity