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Ch11/12KeyTerms AE
| Question | Answer |
|---|---|
| Atoms | All things around us are made of atoms |
| Parts of an atom | Nucleus (Protons & Neutrons) |
| Protons | Positive Charge |
| Neutrons | No Charge |
| Charges are attracted to opposites ( - to + and vice versa) | |
| Electrons | Negative Charge |
| Electrons move around in an orbit around the nucleus due to the protons | |
| Electrons are equal to Protons | |
| Electron Mass is smaller than Proton or Neutron | |
| Overall Charge of an atom is neutral | |
| Electrons, Neutrons, and Protons are all subatomic Particles | |
| The Number of Protons determines which atom it is. | |
| Element | A substance that cannot be broken down into simpler substances |
| Pure Substance | Matter that has the same chemical composition throughout and cannot be separated into its parts by physical means |
| An Atom is the small unit of an element that has properties or characteristics of that element. | |
| The number of subatomic particles causes elements to differ. | |
| Atoms bond by sharing or exchanging electrons. | |
| Molecule | A Group of two or more atoms held together by very strong chemical bonds |
| Molecules can be made up of more than one of the same element | |
| Compounds | pure substances made of two or more different elements that have been chemically joined. |
| Compounds can only be separated by chemical means. | |
| The properties of a molecule or compound can differ from the elements that form them. | |
| Periodic Table of Elements | Presents and organizes information about all elements |
| Atomic Number | Identifies the number of protons in the nucleus of one atom of an element |
| Atomic Mass | Given in atomic mass units(amu) |
| Model | Any Way to show an object or idea |
| Period | Each Horizontal Row in the Periodic Table |
| Group | A vertical column in the periodic table. |
| Metals | Shiny, malleable, ductile, solid at room temperature, and good conductors of heat and electricity |
| Nonmetals | Mostly gases; Dull, Brittle, poorly conductive of heat and electricity |
| Metalloids | Substances with some characteristics of both metals and nonmetals; Semiconductors |
| Chemical Property | a characteristic that determines how a substance will interact with substances during a chemical reaction. |
| Reactivity | How likely an element is to react and form bonds with other elements. |
| Ion | an atom that has a positive or negative charge. |
| Inert | Unable to react chemically |
| Alkali metals | Soft enough to be cut by a knife; Very Reactive; Soft; Silver-colored; Shiny; Low Density |
| Alkaline-earth metals | Very Reactive, but less than Alkali metals; Silver-colored; more dense than alkali metals |
| Halogens | Very Reactive nonmetals because their atoms need to gain only one electron to have a complete outer level; Poor Conductors of electric current; React violently with alkali metals to form salts; never found uncombined in nature. |
| Noble Gases | Unreactive nonmetals; Unreactive; Colorless, Odorless gasses at room temperature. |
Created by:
PhySciLewis1
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