Definition | Vocabulary |
Is the study of matter and the changes it undergoes | Chemistry |
Is also known as a chemical, matter which definite and uniform composition? | Substance |
A measure that reflects the amount of matter | Mass |
Anything that has mass and takes up space | Matter |
A measure of an amount of matter and also the effect of Earth's gravitational pull on that matter. | Weight |
A systematic approach used in scientific study; an organized process used by scientists to do research and to verify the works of others. | Scientific methods |
Information that describes color,odor or other physical characteristics. | Qualitative data |
Numerical information or data i.e. size and weight. | Quantitative data |
Describes a relationship in nature that is supported by many experiments. | Scientific law |
A defined unit in a system of measurement that is based on an object or event in the physical world | Base unit |
Used to express any number between 1 and 10 multiplied by 10 raised to a power. | Scientific Notation. |
The SI unit for length. | Meter |
The SI base unit for mass. | The Kilogram |
The SI base unit for temperature. | Kelvin |
A unit that is defined by a combination of base units. | Derived unit |
The SI base unit for Volume. | Liter |
How close a measured value is to an accepted value | Accuracy |
How close a series of measurements are to one another. | Percision |
All known figures plus one estimated digit | Significant Figures |
The ability or inability of a substance to combine or change into one or more new subtances. | Chemical property |
A characteristic of matter that can be observed or measured without changing the sample. | Physical Property |
Matter that change not change its shape or voulme due to its particles that are thigh and rigid. | Solid |
A form of matter that flows that conforms to its container but its volume does not change. | Liquid |
A form of matter that both conforms to its container and expamds to fill it. | Gas |
A gaseous state of a subtance that is a solid or liquid at room temperature. | Vapor |
A process involing one ore more subtances changing into new substances aka a chemical reaction. | Chemical Change |
States that mass is neither created nor destoryed during a chemical reaction but is conserved. | Law of Conservation of mass |
A transition of matter from one state to another. | Phase of Change |
A type of change that alters the physical properties of a subtance but does not change its compostion. | Physical Change |
A physical blend of two or more pure substances in any proportion. | Mixture |
One that does not have an uniform compostion and in which the indiviual substance remain distinct. | A Heterogeneous Mixture |
One that has a uniform compostion throughtout and always has a single phase aka a solution | Homogenous Mixture |
A Homogenous mixtures are also named. | Solution |
A chemical combination of any two or more different element. In which the elements can be broken down by chemical means and have different properties from those of its component elements. | Compound |
A pure subtance that cannot be broken down into any simpler substances by physical or chemical means. | Element |
A percentage determined by the ratio of each elements to the total mass of the compound. | Percent by mass |
A chart that organizes all known elements into a grid of horizontal rows and vertical columns arranged by increasing atomic number. | Periodic table |
The smallest particle of an element retains all properties of an element and is electrically netrual, sphereically shaped and is composed of electrons,protons and neutrons. | An Atom |
A negatively charged, fast-moving particle with an extermely tiny mass that is found in all forms of matter and moves through the empty space surrounding the atom's nucleus. | An Electron |
A subatomic particle that located in the necleus of an atom and is postively charged. | Proton |
A subatomic particle that is netural and is located in the necleus. | Neutron |
The extremly small, positivetly charged, densed center of an atom that houses the protons and neutrons. | Nucleus |
The number of protons in an atom. | Atomic umber |
Atoms of the same element with different numbers of neutrons. | Isotope |
The weighted average mass of the isotopes of the elements. | Atomic mass |
A form of energy that exhibits wavelike behavior as it travels through space. | Electromagnetic radiation |
Is the shortest distance between equivalent points on a continuous wave. | Wavelength |
Is the number of waves that pass a given point per second. | Frequency |
The wave's height from the origin to a trough. | Amplitude |
Includes all forms of electromagnetic radiation, frequency etc. | Electromagnetic spectrum |
Is the minimum amount of energy that can be gained and lost or gained by atoms. | Quantum |
Electrons that are emitted from metal with a frequency. | Photoelectric effect |
Is a mass less particle that carries a quantum of energy. | Photon |
A spectrum of an element that is the set of frequencies of electromagnetic waves emitted by atoms of the elements. | Atomic emission spectrum |
The lowest allowable energy state of an atom. | Ground State |
The number assigned to each orbital. | Quantum number |
An atomic model in which electrons are treated as waves aka The mechanical model of the atom. | Quantum Mechanical Model of The Atom |
A three dimensional region around the nucleus. | Atomic Orbital |
Is assigned by the quantum mechanical model of the atom to indicates relative size and energy of atomic orbitals | Principal Quantum Number(n) |
The energy levels contained within the principal energy levels. | Energy sublevels |
The arrangment of electrons in an atom, which is exampled in three rules. | Electron Configuration |
Rule 1: States that every electron must occupy the lowest energy level. | Aufbau Principle |
Rule 2: states that a there can only 2 electrons max. occupying a single orbital but only when there is 1 up can there a down arrow. | Pauli exculsion Principle |
Rule 3: All obrital must have an up arrow in each before any can have a down in it. | Hund's rule |
The electrons in an atom's outermost orbitals; determine the chemical properties of an element. | Valence electrons |
The vertical column of elements in the perodic table arranged in order of increasing atomic numbers aka a family | Group |
Are the families of the groups in the same row. | Period |
The groups in row 1,2, 3 13 to 18 are widely of chemical and physical properties are called this to specific them. | Representative element |
Elements in groups 3 to 12 in the modern periodical table that are contained in block d. | Transition element |
Elements that are shiny when flat, clean, is a solid at room, and is a good conductor of heat and electricity.(expect for mercury) | Metal |
Group 1 (expect hydrogen)in the periodic table are usually compounds with other elements. | Alkali metal |
Are two groups two the periodical table, which are highly reactive. | Alkaline earth metal |
Elements in groups of 3 to 12 of the periodical table contained in block b, some exceptions fill the outer most s orbital.= | Transition metal |
A type of group B elements that contains the f- orbital. | Inner transition metal |
In the periodical table, the f-block elements from period 6 that follow the element lanthanum. | Lanthanide series |
In the periodical table the f-block elements from that follows the elements function. | Actinide series |
Elements that are generally gases or dull, brittle solids that poor conductors of heat and electricity. | Nonmetal |
An extremely unreactive group of 18 elements. | Noble gas |
An element that has physical and chemical properties of both metals and nonmetals. | Metalloid |
A highly reactive group of 17 elements. | Halogen |