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Basic Chemistry

QuestionAnswer
atom smallest unit of matter that still retains the properties of an element
element a substance that cannot be broken down into other substances
compound substance consisting of 2 or more elements in a fixed ratio
charge of a proton positive
charge of an electron negative
charge of a neutron neutral
atomic number is the number of protons in the nucleus of an atom
atomic mass is the number of protons and neutrons in the nucleus of an atom
the 6 most common elements in living things are CHNOPS
what does CHNOPS stand for carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfer
the element you are mostly by weight is oxygen
the most common element by numbers is hydrogen
nitrogen is used in living systems to make proteins
hydrogen and helium only have 1 shell of electrons
valence electron is the number of electrons in the outer electron shell
the first shell, second, third can hold 2, 8, 8
atoms are most stable when their outermost shell is full
an atom is an ion when it is charged
a positive ion has an extra proton
a negative ion has an extra electron
Created by: edenbreslauer