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Unit 2 test

Chemistry of Life/ Macromolecules

QuestionAnswer
Matter Anything that has mass and occupies space
Atom Smallest part of an element that still has the properties of that element
Element Pure substance that consists entirely of one type of atom
What are the 6 elements necessary for life? C, H, O, N, P,, S
Cell Most basic unit of life
Atoms are made of these subatomic particles: protons (p+), neutrons (n), and electrons (e-)
Protons - charge, location positive, nucleus, number of protons determines the identity of an element
Neutrons - charge, location No charge, nucleus
Electrons - charge, locations Negative, electron cloud- surrounding the nucleus , energy levels or energy shells
Where is the atom's mass located? In the nucleus (protons and neutrons)
Where is most of the atom's volume located? In the negatively-charged electron cloud
What information can we gather from the periodic table? An atom's symbol. atomic number, and atomic mass, number of electron energy levels, and number of valence electrons
What's an atom's symbol? One to three-letter abbreviation of the name of an element; located in the center of the square
Atomic number- location in periodic table; what does it tell you? Usually above the symbol; it's equal to the number of protons
What number in the periodic table can be used to identify an atom? Atomic number = number of protons
Average atomic mass- location in periodic table; what is it? Located below the symbol of the element; It's the sum of p+ and n.
Isotope two or more forms of the same element (same atomic number= same number of protons), with different numbers of neutrons.
Do different isotopes of the same element have the same atomic number? Yes, they do because they have the same number of protons
Do different isotopes of the same element have the same atomic mass? No, they do not because they differ in the number of neutrons, and atomic mass is p+n.
Examples of isotopes? Hydrogen-1, Hydrogen-2, Hydrogen-3 or, Carbon-12, Carbon-13, Carbon-14
Created by: lclark523
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