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Unit 4 vocab
Unit 4 vocab for lewis
| Term | Definition |
|---|---|
| Atomic Mass | Average mass of one atom of an element. |
| Periodic table | A table where all element are arranged into periods and groups. |
| Chemical symbol | One or two letter that stands for an element. |
| Period | A row of elements in the periodic table arranged by atomic number. |
| Group | A column of elements in the periodic table, in which elements have certain preperties in common. |
| Matter | The material that all objects and substances are made of. |
| Element | Substances that are the building blocks of all matter |
| Compound | Matter made of two or more elements. |
| Atom | Smallest particle inot which on element can be divided and still have the preperties 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 | A small, positively charged particle in the nucleus of the atom |
| Neutron | A cell that carries information through the nervous system |
| Energy level | The amount of energy carried by an electrons in an atom |
| Isotope | Atoms of the same element with different number of neutrons in the nucleus |
| Mass number | The sum of protons and neutrons in the nucleus of an atom |
| Atomic number | Number of pretons in the nucleus of one atom of an element |
| Metals | Elements, usually solids, with a shiny surface |
| Malleable | A term used to discribe material |
| Ductile | Material that can be pulled out into a long wire |
| Conductivity | Transfer of heat from a warmer substance to a cooler substance through direct contact |
| Reactivity | The state or power of being reactive or the degree to which a thing is reactive |
| Corrosion | Some metal react with oxygen to in the air |
| Akali metals | A group of elements in group 1 |
| Akali earth metal | An element in group 2 |
| Alloy | A mixture of one or more elements |
| Nonmetal | An elementthat lacks most of the properties of a metal |
| Diatomic molecule | A molecule consisting of two atoms |
| Halogens | Elements in group 7A |
| Nobel gases | Elements in group 8A |
| Metaloid | Elements that has some characteristics of both metal and nonmetal |
| Semiconductor | A substance that can conduct electricity |
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hunt4lyfe
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