Term
| What is the difference between a chemical and physical change? |
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Definition
A chemical change is a change inwhich one or more substances are converted into a differnt.
Physical changes don't alter the identity but the appearance of a substance |
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Definition
| A fixed composition that's always homogenous |
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Term
| What does the arrow mean in a chemical equation? |
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Definition
| means Yeilds to another reaction |
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Term
| How is a substance different from a mixture? |
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Definition
| Every sample of a given pure substance has exactly the same characteristic properties. Every sample of a pure mixture has exactly the same composition. |
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Term
The following are examples of what?
*chocolate melting when heated
*Cutting a piece of paper into pieces |
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Definition
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Term
| What is the purpose of a chemical equation? |
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Definition
| To give a mathematical description of a chemical reaction |
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Term
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Definition
Sig Fig if
*Not a zero
*To right of decimal and a non-zero number.
*Inbetween sig figs. |
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Term
| How many sig figs in 0.01035? |
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Definition
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Term
| How many sig figs in 0.500? |
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Definition
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Term
| How many sig figs in 9.0? |
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Definition
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Term
| How many sig figs in 0.010? |
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Definition
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Term
| How many sig figs in 5010? |
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Definition
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Term
| What is the definition of accuracy? |
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Definition
| How close an object is to a desired target |
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Term
| What is the definition of precision? |
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Definition
| How many times an object hits near the same place |
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Term
| What Particles have a positive charge? |
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Definition
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Term
| What particles have a negative charge? |
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Definition
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Term
| What is the nucleus of an atom? |
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Definition
| An atom's positive center |
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Term
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Definition
| Help hold the neucleus together |
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Term
| What force holds electrons to an atom? |
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Definition
| Opposite charges attract (electronic force) |
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Term
| What determines the atomic number of an element? |
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Definition
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Term
| What determines the mass number of an element? |
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Definition
| The number of protons and the number of neutrons. |
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Term
| What is the difference between mass number and the atomic mass on the periodic table? |
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Definition
| The atomic mass the average occuring weight of the atom and the mass number is the sum of cell proton and neutron |
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Term
| What is Avagrado's Number? |
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Definition
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Term
| Evidence for electrons having limited allowed values of energy while in an atom is... |
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Definition
| The emission light spectrum |
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Term
| List the sublevels from lowest to highest energy. |
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Definition
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Term
| As an electron gains energy, is it most likely to be near the nucleus or less likely to be near the nucleus? |
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Definition
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Definition
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Term
| What is the difference between a spin "up" and a spin "down" electron? |
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Definition
| "up" contain one electron, "down" contain two |
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Term
| When a chemical reaction emits light but no heat, this is called? |
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Definition
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Term
| What is the difference between Flourescence and Phosphorescence? |
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Definition
| Floresence happens immediately, Phosphorescence takes a little while |
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Term
| How are flourescence and phosphorescence similar? |
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Definition
| Both absorb light at high frequency. |
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Term
| What are the basic organizing prinicples of the modern periodic table? |
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Definition
| It arranges the element by both the atomic number and it's properties. |
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Term
| Where on the periodic table are the non-metals? |
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Definition
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Term
| Why are the noble gases monstly unreactive? |
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Definition
| Because extrastable mean loew energy configuration. |
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Term
| What does the stair-step on the periodic table represent? |
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Definition
| The difference between the Metals and Non-metals |
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Term
| The transition metals are elements with their last electron in a __ Subshell |
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Definition
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Term
| What is the Valence shell of an atom? |
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Definition
| The subshell witht the highest coefficent |
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Term
| How is the radius of an atom defined? |
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Definition
| It's half the distance between the nuclei of identical atoms that are bound together. |
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Term
| Positive ions tend to be smaller than a neutral atom because...? |
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Definition
| There's fewer electrons repelling eachother so they are incapable of getting closer to eachother. |
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Term
| Where are the elements with the largest electronegativity? |
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Definition
| The upper right of the P-Block. |
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Term
| Where are the largest Neutral Atoms? |
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Definition
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Term
| Ehhh... What the heck. Here's a periodic table of elements. why not? |
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Definition
[image]
Nonmetals = Group 14-18 on right side of stair step
Metals = Group 13 (excluding stair step)
Transitive metals= D-Block and F-Block
When reading the Periodic table from left to right you see S, D, P, F versus it's usual form of S, P, D, F (which list the blocks inorder from least to greatest) |
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