Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
Atom
|
a very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons.
|
|
|
Nucleus
|
positively charged, central (center) part of an atom
|
|
|
Proton
|
positively charged particle located in nucleus of an atom
|
|
|
Neutron
|
an uncharged particle located in the nucleus of an atom
|
|
|
Electron
|
invisible, negatively charged particle located in a cloudlike formation that is outside the nucleus of an atom
|
|
|
Orbit
|
the path of an electron around an atomic nucleus
|
|
|
Electron Shell
|
the orbits outside the nucleus where electrons are found, according to Bohr’s model.
|
|
|
Valence electron
|
the electrons on the outer shell of an atom; determines an element’s chemical and physical properties
|
|
|
Scientific Theory
|
a widely-accepted explanation that is supported by evidence and experimentation, but is not yet proven.
|
|
|
Scientific law
|
a rule that describes a pattern in nature; has been proven true.
|
|
|
Electron Cloud
|
spherical cloud surrounding the nucleus
|
|
|
Periodic Table
|
a table of the chemical elements arranged in order of atomic number, arranged so that elements with similar properties appear in vertical columns
|
|
|
Atomic Mass
|
average mass of an atom of an element. Can be found in the bottom of the element box. Tells the number of protons and neutrons in the nucleus
|
|
|
Atomic Number
|
number of protons and electrons in the nucleus of each atom. Located in the top of the element box
|
|
|
Period
|
horizontal rows of the periodic table
|
|
|
Group
|
vertical columns of the periodic table
|
|
|
Family
|
elements of the same group that share many physical and chemical properties
|
|
|
Metal
|
elements that are good conductors of electricity that have a shiny or metallic luster
|
|
|
Nonmetal
|
poor conductors of electricity and are dull in appearance
|
|
|
Metalloid
|
an element that has some properties of both a metal and a nonmetal
|
|
|
Luster
|
shiny or able to reflect light
|
|
|
Conductivity
|
the ability to allow heat and electricity to pass through
|
|
|
Conductor
|
lets electrons move through freely; an object with a high conductivity
|
|
|
Semiconductor
|
conductivity between an insulator and most metals; an object with a low conductivity
|
|
|
Insulator
|
stops the flow of electrons; an object without conductivity
|
|
|
Malleability
|
the ability of a substance to be hammered into shapes (bendable)
|
|
|
Ductility
|
ability to be drawn into wire
|
