LSU BIOL 1001 Chapter 2 Vocabulary
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element - 🧠 ANSWER ✔✔A substance that cannot be broken down, or
converted, to a simpler substance by ordinary chemical reaction.
chemical reactions - 🧠 ANSWER ✔✔A process that forms and breaks
chemical bonds that hold atoms together in molecules.
atom - 🧠 ANSWER ✔✔The smallest unit of an element that retain the
properties of the element.
neutron - 🧠 ANSWER ✔✔A subatomic particle that is found in the nuclei of
atoms, bears no charge, and has a mass approximately equal to that of a
proton.
, proton (p+) - 🧠 ANSWER ✔✔A subatomic particle that is found in the nuclei
of atoms; it bears a unit of positive charge and has a relatively large mass,
roughly equal to the mass of a neutron.
electron (e-) - 🧠 ANSWER ✔✔A subatomic particle, found in an electron
shell outside the nucleus of an atom, that bears a unit of negative charge
and very little mass.
mass number - 🧠 ANSWER ✔✔The total number of protons and neutrons
in the nucleus of an atom.
atomic nucleus - 🧠 ANSWER ✔✔The central part of an atom that contains
protons and neutrons.
atomic number - 🧠 ANSWER ✔✔The number of protons in the nuclei of all
atoms of a particular element.
periodic table - 🧠 ANSWER ✔✔A chart first devised by Russian chemist
Dmitri Mendeleev that includes all known elements and organizes them
according to their atomic numbers in rows and their general chemical
properties in columns.
2026 Expert Verified | Ace the Test
element - 🧠 ANSWER ✔✔A substance that cannot be broken down, or
converted, to a simpler substance by ordinary chemical reaction.
chemical reactions - 🧠 ANSWER ✔✔A process that forms and breaks
chemical bonds that hold atoms together in molecules.
atom - 🧠 ANSWER ✔✔The smallest unit of an element that retain the
properties of the element.
neutron - 🧠 ANSWER ✔✔A subatomic particle that is found in the nuclei of
atoms, bears no charge, and has a mass approximately equal to that of a
proton.
, proton (p+) - 🧠 ANSWER ✔✔A subatomic particle that is found in the nuclei
of atoms; it bears a unit of positive charge and has a relatively large mass,
roughly equal to the mass of a neutron.
electron (e-) - 🧠 ANSWER ✔✔A subatomic particle, found in an electron
shell outside the nucleus of an atom, that bears a unit of negative charge
and very little mass.
mass number - 🧠 ANSWER ✔✔The total number of protons and neutrons
in the nucleus of an atom.
atomic nucleus - 🧠 ANSWER ✔✔The central part of an atom that contains
protons and neutrons.
atomic number - 🧠 ANSWER ✔✔The number of protons in the nuclei of all
atoms of a particular element.
periodic table - 🧠 ANSWER ✔✔A chart first devised by Russian chemist
Dmitri Mendeleev that includes all known elements and organizes them
according to their atomic numbers in rows and their general chemical
properties in columns.
