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unit 4 vocab science
Mrs. Lewis's 2nd Block
| Term | Definition |
|---|---|
| Atomic mass | Average mass of one atom of an element. |
| Periodic Table | A chart where all elements are organized into periods and groups according to their properties. |
| Chemical Symbol | One or two letter code that stands for and element. |
| Period | A row of elements in the periodic table arranged by atomic number. |
| Group | Column of elements have certain properties in common also called chemical family. |
| Matter | The material that all objects and substances are made of anything that has mass and takes up space. |
| Element | Substances that are the building blocks of all matter |
| Compound | Matter made of two or more elements. |
| 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 nucleus of an atom. |
| Nucleus | Structure near the center of a cell that contains the cells DNA. |
| Proton | Positively charged particle with neutral charge lovated in the nucleus. |
| Energy Level | The amount of energy carried by an electron in an atom determines the electrons average in an atom. |
| Nuetron | In an atom particle with nuetral cahrge located in the nucleus. |
| Isotope | Atoms of the came element with different number of nuetrons in the nucleus and thus different atomic masses. |
| Atomic Number | Number of protons in the nucleus of one atom of an element. |
| Metal | Elements usually solid with a shiny surface metals conduct. |
| Malleable | A term tha used to describe material that can be pounded into shapes. |
| Ductile | A term used to describe a material that can be pulled out into a long wire. |
| Conductivity | The ability object to transfer heat or electricity. |
| Reactivity | The ease and speed with which an element combine or reacts. |
| Corrosion | The gradual wearing away of a metal element due to chemical reaction. |
| Alakali Metal | An element in Group 1 of the periodic table. |
| Alakine Earth Metal | An element in Group 2 |
| Transition Metal | Element in Group3 through 12. |
| Alloy | A mixture of two or more elements one of which is metal. |
| Nonmetal | An element that lacks most of the properties of metal. |
| Diatomic Molecule | A molecule consisting of two atoms. |
| Halogen | An element found in Group 17 Periodic Table. |
| Nobel Gas | An element in Group 18 |
| Metalloid | An element that has both metals and nonmetals. |
| Semiconductor | A substance that can conduct electricty under same condition. |
Created by:
ian_brocato
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