Human Chemistry 3 Flashcards
Define Antioxidants:
Chemicals that neutralize free radicals
Ex: Vitamim C
Define Radioisotopes:
Unstable isotopes that amit radiation
All elements have at least ONE?
Radioisotope
Define Ionizing Radiation:
High energy radiation that converts neutral atoms into IONS
Why is Ionizing Radiation bad for you?
Produces free-radicals which can destroy cells and tissuea
In loe doses ionizing radiation can be?
Mutagenic, cause DNA mutations or cancer
In high doses ionizing radation can cause?
Death
The periodic table of elements organizes elements by?
The # of protons/ Atomic #
How many elements are found in humans?
24
The most COMMON elements in humans are?
CHON (CA)P Oxygen Carbon Hydrogen Nitrogen Calcium Phosphorus
Define Molecule:
Electrically neutral groups of 2 or more atoms, held together by chemical bonds
A subscript after a symbol/letters tells us?
The # of atoms in the molecule
H2
Define Chemical Bond:
Interaction b/w atoms that bind together to form molecules
What is required for Chemical Bonds?
Energy is required and energy is released when bonds are broken