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CHEMISTRY-Chapter 2

Chapter 2

atomsAnswer
structure nucleus, protons, electrons and electron orbital
atomic number # of protons in nucleus
mass number protons + neutrons
atomic # HOW MANY PROTONS IN THE NUCLEUS
# of neutrons mass # - atomic # = # of protons
molecules two or more atoms joined together by ionic or covalent bonds
ions loss or gain of electrons
Na+ (sodium) loss of electron
free radical UNCHARGED atom/group of atomsw/at least 1 UNPAIREDELECTRON/HIGHLY REACTIVE
anitoxidants absobs free radicals
electrolytes ionize in water;ions required by cells to regulate elec. charge/flow across cell membrane
compounds 2 or more atoms joined together by ionic or covalent bonds
ELEMENT quantity of matter made of atoms of the same kind
ion OUTER ELECTRON SHELL IS COMPLETE
COVALENT BONDS sharing of 1 or more electrons between 2 atoms
ISOTOPE atom of an element that has a different # of neutrons
NON-POLAR COVALENT compounds that evenly share electron pairs
ANION NEGATIVELY CHARGED ION
CATION POSITIVELY charged ion
Na atom mass # is 23, it has 12 neutrons and... 11 protons
HELIUM is a chemically stable gas outer most shell is completely filled
hydrogen bonds attraction of oppositely charged parts of molecules
H2 and Cl2 COVALENT BOND
Created by: Denice