This site is 100% ad supported. Please add an exception to adblock for this site.



undefined, object
copy deck
atomic number
The number of protons in an atom's nucleus
a tentative theory about the natural world
a well-substantiated explanation of some aspect of the natural world; Theories answer the question of Why things happen.
a particle that is electrically charged (positive or negative)
molecular compound
a compound made up of two non metals; sharing electrons, smallest unit is a molecule
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas, very low melting point and density
make less brittle by heat and gradual cooling
core electrons
The electrons in the inner shells of an atom; these electrons are not involved in forming bonds.
atomic mass unit
A unit equal to one twelfth the mass of a carbon-12 atom.
the elements of Group 17 (fluorine, chlorine, bromine, iodine, and astatine), contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts
exothermic, gas to solid
valence electrons
The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.
transition metals
Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alkali-earth metals, shiny, good conductor of thermal energy and electrical current, high density
a positively charged ion; metals form cations, named the same as the metal
positively charged particles located in the nucleus
hardening something by heat treatment, makes metal springy
uniform mixture
unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure
binary molecular compounds
two nonmetals
physical properties
Are characteristics that can be measured or detected by the senses.Color, size, odor, and density are phyisical properties.
composed of unlike parts, different, diverse; not uniform mixture
binary ionic compound
metal and nonmetal, either type I or type II
a generalization that describes recurring facts or events in nature; laws answer the question of What will happen. Quantifies with numbers
closeness of a set of measurements of the same quantity made in the same way
no charge; mass of 1 amu; the number of these may vary in atoms of the same element (isotopes); the symbol is n
potential energy
stored energy the amount of potential energy of an object depends on its position or condition (nuclear, chemical)
chemical properties
properties that relate how a substance transforms or reacts with another substance
solid to a gas (does not go through liquid stage first)
(mathematics) the number of significant figures given in a number
binary compound
chemical compound composed of only two elements
rare earth metals
very rare; U-92 was the last naturally occurring element.
alkali metals
Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium
molecular element
7 mulit-atom molecules that never exist alone. (diatomic) Mr. BrINCHlHOF
makes brittle by heating and then cooling quickly, less flexible
alkali earth metals
an elemnet in group 2, harder, higher melting point, and denser than alkali metals. Reactive, but less than corresponding alkali metal
The habit or characteristic of recurrence at regular intervals.
pure substance
a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
having periods, or repeated cycles
same element, but diff atomic mass number b/c diff # of neutrons
ionization energy
The amount of energy needed to completely remove an electron from an atom
Polyatomic ionic
metal and poliatomic ion, either type I or type II
binary acids
H and a nonmetal
periodic law
the law that states that the repeating chemical physical properties of elements change periodically with the atomic numbers of the elements.
H and a polyatomic ion
noble gases
one of the elements of group 18 of the periodic table(helium, neon,argon, krypton, xenon, and radon); noble gases are unreactive, Contains nonmetals that are unreactive. Full outermost energy level except helium which has 2.
a pure substance that is made up of only one kind of atom
the science of matter
a negatively charged ion; non metals form anions, named by changing the ending of the name to -ide
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
ionic compound
Consists of a positive ion (metal) and a negative ion (non metal) with an overall charge of zero, no individual molecule units, a 3-D array of cation and anions made of formula units. (ex. NaCL (1:1) (repetition of ratio))
mass numbers
the sum of neutrons and protons in the nucleus of an atom.
Found in electron shells around nucleus. Have negligible mass and negative charge.
kinetic energy
energy of motion (electrical, heat or thermal, light or radiant)

Deck Info