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Ch 11/12 JAL yeahboy
YEAH BUDDY. #sike
| Question | Answer |
|---|---|
| Atoms | All things are made up of atoms |
| Parts Of An Atom | Nucleus (protons & neutrons) |
| Protons | Positive charge |
| Neutrons | Have no charge |
| Opposites Attract | + attracts - & vice versa |
| Electrons | Negatively charged particles on the outside of the nucleus |
| Number of Electrons | Number of Protons |
| Number of Protons | Determines what kind of atom it is, which is identified as a different chemical element |
| Element | Substance that cannot be broken down into simpler substances by ordinary chemical means |
| Pure Substance | Can’t be broken down into its parts by physical means |
| Element Atoms | Same # of protons |
| Elements Found in Nature | 90 |
| Atom | Smallest unit of element with properties or characteristics of said element |
| Molecule | Group of 2+ atoms held together by very strong molecular bonds |
| Molecular Bonds | Form between atoms that share electrons |
| Made of more than one atom of the same element | Molecule |
| Compound | Pure substance made of 2+ chemically combined elements |
| Proportions in Compounds | Always stay the same |
| Chemical Reaction | Only way to separate compounds |
| Chemical Formulas | Identify and represent elements, molecules, and compounds |
| 90 | Amount of elements found in nature |
| Periodic Table of Elements | Presents and organizes info about all elements |
| Atomic Number | Amount of protons in nucleus of one atom in element |
| Atomic Mass | Protons + electrons |
| Group/Family | Vertical column in periodic table |
| Period | Horizontal row in periodic table |
| Metals | 75% of elements in periodic table. They are shiny, ductile, malleable, usually solid at room temperature, and good conductors of heat and electricity. Go from group 13-16. |
| Nonmetals | Dull, brittle, and bad conductors of heat and energy. Spread out in Groups 14, 15, and 16; definitively in 17 and 18. |
| Metalloids | Have characteristics of metals and nonmetals. They are semiconductors. |
| Chemical Property | Characteristic that determines how a substance will interact with other substances during chemical reaction |
| Reactivity | How likely an element is to react and form bonds with other elements |
| Ion | Atom with positive OR negative charge |
| Inert | Unable to react chemically |
| Alkali Metals | Soft enough to be cut with a knife |
| Alkaline Earth Metals | Very reactive, but not as reactive as alkali metals; more dense than alkali metals |
| Transistion Metals | Groups 3-12; less reactive than alkaline earth metals; shiny, good conductors of thermal energy and electric current, higher densities and melting points than Group 1 and Group 2 |
| Boron Group | Group 13; one metalloid and four metals; reactive; solid at room temperature |
| Carbon Group | Group 14; one nonmetal, two metalloids, and two metals; reactivity varies among the elements; solid at room temperature |
| Nitrogen Group | Group 15; two nonmetals, two metalloids, and one metal; reactivity varies among the elements; all but nitrogen are solid at room temperature |
| Oxygen Group | Group 16; three nonmetals, one metalloid, and one metal; reactive; all but oxygen are solid at room temperature |
| Halogens | Group 17; very reactive; nonmetals; poor conductors of thermal energy and elecrtic current; react violently with alkali metals to form salt; never found uncombined in nature |
| Noble Gases | Group 18; unreactive; nonmetals; colorless, odorless gases at room temperature |
| Hydrogen | Reactive; colorless, odorless gas at room temperature; low density; reacts explosively with oxygen; has no group |
Created by:
PhySciLewis1
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