Basic Chemistry of life Flashcards
all living and nonliving things are made up of…
matter
anything that has mass and volume
matter
what three parts are atoms made of?
Protons
Neutrons
Electrons
protons and neutrons are found in…
nucleus
electrons move around the nucleus in the…
electron cloud
a substance that can’t be broken down into a simpler substance
Element
how many types of atoms are in an element?
one
represents an element
symbol
has information about elements
periodic table
how many elements occur naturally?
92
how many elements are important for life?
25
6 elements basic to life
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur
Compound formulas tell you…
type of atom
number of atoms
atoms taking of giving electrons
chemical bonds
are electrons shared evenly?
No, they are closer to the oxygen than hydrogen
oxygen takes a ___ charge
negative
hydrogen takes _____ charge
positive
water is a _____ molecule
polar
a molecule with an unequal distribution of charge
have positive and negative end
polar molecule
positive and negative things _____ one another
attract
oxygen ( - or +)
negative
hydrogen (- or +)
positive
weak attraction berween the chatges of hydrogen and oxygen
Hydrogen bond
