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Chapter 11/12 Notes
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 |