LIFE SCIENCE EXAM 1 Flashcards


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1

second law of thermodynamic

isolated system state of entropy increases over time. heat moves from hotter objects to colder objects

2

atomic number

number of protons in the nucleus of an atom

3

atomic weight

total weight of an atom

4

isotopes

two or more forms of the same element with equal numbers of protons but different numbers of neutrons in the nucleus

5

isotopes

two or more forms of the same element with equal numbers of protons but different numbers of neutrons in the nucleus

6

energy levels and orbitals

energy levels fixed difference from the nucleus. farther from the nucleus the more energy. orbital is volume of space within energy level where an electron most likely to be found

7

oxidation reduction reactions

chemical reaction which oxidation number can either gain or lose an electron. gaining=oxidation oxidation=reduction

8

covalent bond

sharing one or two atoms

9

ionic bond

two or more ions come together held by charge differences

10

dehydration synthesis

two molecules joined by removing water

11

hydrolysis reaction

one molecule breaks apart from multiple smaller molecules. breaks down chemical bonds