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Unit 4 Vocabulary
Unit 4 Vocabulary for Science
| Term | Definition |
|---|---|
| Atomic Mass | Average mass of one atom of an elements |
| Periodic Table | A Chart where all elements are organized into periods and group according to thier to thier properties |
| Chemical Symbol | One or two letter code that stands for an element; many sumbols are abbrievation of the elements name, which may be latin, english, or greek in origin |
| Period | A row of elements in the periodic table arranged by atomic number |
| Group | Column of elements in the periodic table, in which elements have certain properties in common; also called chemical family |
| Matter | The material that all objects and substances are made of; anything that has a mass and takes up space |
| Element | Substances that are the building block or all matter; an element is made up of one kind of atom |
| Compound | Matter made of two or elements; the elements in a compound are chemically bonded, cannot be seperated by physical means, and a compound has properties that are different from the elements that make it up |
| Atom | Smallest particle into which an element can be divided and still have the properties of that element |
| Electron | Negatively charged particle found outside the nucleas of a proton |
| Nucleas | Center of an atom made up of protons and neutrons |
| Proton | Positively charged particle in the nucleas of an atom |
| Neutron | In a atom, particle with a neutral charge; located in the nucleas |
| Energy Level | The amount of energyh carried by an electron in an atom; determines the electron's average distance from nucleas |
| Isotype | Atoms of the same element with different numbers of neutrons in hte nucleas, and thus different atomic masses for example, carbon-12 |
| Mass Number | The sum of protons and neutrons in the nucleas of an atom |
| Atomic Number | The number of protons in the nucleas in the nucleas of a atom |
| Metal | A class of elements characterized by physical properties: shiniess, malleability, ductility, conductivity |
| Malleble | A term used to describe material that can be pounded into shapes |
| Ductile | Term to describe a material that can be strecthed into a long object |
| Conductivity | The ability of a n object to transfer heat to another object |
| Reactivity | The ease or speed with an element comines or reacts, with other elements or compound |
| Corrosino | The gradual wearing away of metal element element due to chemical reaction |
| Alkai Metal | An element in group 1 of the periodic table |
| Alkaline Earth Metal | An element in group 2 of the periodic table |
| Transition Metal | One of the element in group 3 through 12 of the periodic table |
| Alloy | A mixture of two or more elements, one of which is a metal |
| Non-Metal | An element that lacks most of the properties of a metal |
| Diatomic Molecule | A molecule consiting of two atoms |
| Halogen | An element foung in group 17 of the periodic table |
| Metaloid | An element that has some characteristics of both metal and non-metals. |
| Noble Gas | An element foung in group 18 of the periodic table |
| Semi-Conductor | A substance that can conduct electricity under some conditions |
Created by:
Tado626
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