Chem Inorganic Study Guide UIW 2019.docx - Atoms Atomic...

Atoms Atomic Number = # of protons Atomic Weight
=protons + neutrons Isotopes = different number of
neutrons–Changes Atomic number or Atomic
Weight? •Large isotopes may be unstable–Nucleus
decays releasing particles and energy waves–
Damages tissue
Common Elements in the Human Body Four
elements make up about 96% of human body
weight. Oxygen (O) 65.0%Carbon(C)
18.5%Hydrogen (H) 9.5%Nitrogen (N) 3.2%
•Other important elements:–Calcium (Ca),–
Phosphorus (P)–Potassium (K from calcium L.)–Sulfur
(S)–Sodium (Na from atrium L.)–Chlorine (Cl)–
Magnesium (Mg)–Iron (Fe from forum L.)
•Trace elements are present in small amounts but are
essential for life. Includes:–Iodine (I)–Chromium
(Cr)–Cobalt (Co)–Copper (Cu from cuprum L.)–
Fluorine (F)–Selenium (Se)–Zinc (Zn)

•Other important elements:–Calcium (Ca),–
Phosphorus (P)–Potassium (K from calcium L.)–Sulfur
(S)–Sodium (Na from atrium L.)–Chlorine (Cl)–
Magnesium (Mg)–Iron (Fe from forum L.)
Common Elements in the Human Body Four
elements make up about 96% of human body
weight. Oxygen
(O)65.0%Carbon(C)18.5%Hydrogen
(H)9.5%Nitrogen (N)3.2%
Atoms • Atomic Number = # of protons • Atomic
Weight = protons + neutrons • Isotopes =
different number of neutrons –