basic chemistry Flashcards
ecosystem
community
populations
organism
organ systems
organs
tissues
cells
water and living things
all living things
on species
1 individual
what is matter
anything that has mass and takes up space
what is an element
substance that cannot be broken down further in to other substances
what are trace elements
required only in small amounts but without them, can die
iodine
what is a compound
combination of various elements in a fixed ratio.
what is an atom
proton
electron
neutron
smallest unit of matter
subatomic particle with positive charge
unit of negative chrage
no charge
nucleus
atomic number
mass number
mass
neutrons and protons
number of protons and what elements
sum of protons and neutrons
measure of amount of matter
what is isotope
radioactive
atom with same number of protons and electrons but varying neutrons
the one that nucleus is not stable and gives off energy
what is an ion
ionic bond
an electrically charged atom or atoms because of gaining or losing electrons.
attraction held by ions
in=>out
reactans=>products
acid
base
we use pH scale for potential Hydrogen
buffers
a chemical that donates H+ is…
accepts hydrogens and add OH-
substances that resistchangein pH by accepting or donating them
