Chemistry Review Flashcards
How much of your food dollar goes to farms?
22%
Food science
the study of the composition of food and the process used to convert raw agricultural products into more acceptable forms
Food quality
form of scientific standpoint, a measurement obtained by grading or classifying a products chemical and physical characteristics in accordance w/ predetermined specifications
external factors
media, race,culture, location, traditions, holidays, and individual experiences
essential elements
appearance and texture
advertising
length of time, repetition, media use, strategies
matter
anything that occupies space and has mass
element
substance that contains only one kind of element
atom
nucleus (protons and neutrons) and electrons
smallest unit of an element
cannot be broken by any chemical means
neutron
neutral and in the nucleus
proton
positive and in the nucleus
electron
negative and travels around the nucleus
Valence electron
outer shell electron
Ion
a molecule that has acquired a charge by either gaining or losing electrons
neutral charge
same number of protons and electrons
positive charge
more protons than electrons
negative charge
more electrons than protons
molecule
atom plus an atom plus an atom
ionic bond
transfer electrons
covalent bond
share electrons
electronegativity
forces an atom has to attract other electrons (grade form 0-4) zero is weak and 4 is strong
Types of covalent bonds
polar and non polar
nonpolar bonds
even sharing of electrons between two atoms
polar bonds
unequal sharing between two atoms
hydrogen bonds
are very weak because of the polar bond (most of the time hydrogen bonds will be referring to water)
