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Unit 4 Vocabulary
| 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 |
| Period | A row of elelments in the periodic table arranged by atomic number |
| Chemical Symbol | One or two-letter code that stands for an element |
| Group | Column of elements in the periodic table, which have certain properties in common |
| Matter | Anything that has mass and takes up space |
| Element | Substances that are the building block of matter |
| Compound | Matter made of two or more elements |
| Atom | Smallest particle |
| Electron | Negatively charged particle, found outside nucleus of atom |
| Nucleus | Center of an atom |
| Proton | Positively charged particle, in nucleus of atom |
| Neutron | Neutral charge, in nucleus of atom |
| Energy Level | The amount of evergy carried by an electron in a atom |
| Isotope | Atoms of the some element with different numbers of neutrons in the nucleus of atom |
| Mass Number | The sum of protons and neutrons in the nucleus of a atom |
| Atomic Number | Number of protons in the nucleus of one atom of an element |
| Metal | A class of elements characerized by physical properties |
| Malleable | A term used to describe material that can be pounded into shapes |
| Ductile | A term used to describe material that can be pulled out into a long wire |
| Conductivity | The ability of an abject to transfer heat or electricity to another object |
| Reactivity | The ease and speed with ehich an element combines, or reacts with other elements and compounds |
| Corrosion | The gradual wearing away of a metal element due to a chemical reaction |
| Alkali Metal | An element in Group 1 of the periodic table |
| Alkali Earth Metal | An element in Group 2 of the periodic table |
| Transition Metal | One of the elements in Group 3 through 12 of the periodic table |
| Alloy | A mixture of two or more elements, one of which is metal |
| Nonmetal | An element that lacks most of the properties of a metal |
| Diatomic Molecule | A molecule consisting of two atoms |
| Halogen | An element found in Group 17 of the periodic table |
| Nobel Gas | An element in Group 18 of the periodic table |
| Metaloid | An element that has come characteristics of both metals and nonmetals |
| Semiconductor | A substance that can conduct electricity under some conditions |
Created by:
Grey Gasai
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