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Science Practices and Foundations

By Sydney Dobriner
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Across
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- Particle located inside the atom that has a neutral charge - Has a mass of 1 amu (but really a little larger!)
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- The capability of a material to be shaped or extended - What is it called when metals can be hammered?
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- To break down into similar parts - Water can go through this to turn into hydrogen and oxygen
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- One of the most reactive metal -These metals are located in group 1
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- The sum of the number of protons and the number of neutrons for an atom - This for Helium is 4.00
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- Numbers in a measurement that show how precise it is - Zeros that are sandwiched in the middle of a number are not these (ex: 1001 only has 2 of these)
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- You determine this by doing (Mass/Volume=P) - 1 g/ml is the ______ of water.
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- Negatively charged particle inside the atom - Located on the outside of the Nucleus
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- Several measurements that are very close in values - Data that has more of this can be found again and again in repeated experiments
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- How close a number is to the accepted or correct value - Sydney determined the density of water to be 1.1 g/mL while Emily said it was 1.2 g/mL. Sydney’s answer has more __________ because the real density of water is 1.0 g/mL.
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-The smallest particle of an element -Inside are protons, electrons, and neutrons
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- Found as a diatomic molecule naturally - Most reactive nonmetals
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- Properties that can be observed and/or measured - The atom or molecule is chemically the same after a __________ change (ex: freezing and melting)
Down
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- Positively charged particle located in the nucleus - Has a mass of 1 amu
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- A way to measure the weight of really small particles like molecules - Represented by the letters (amu) or (u)
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-The number you calculate to determine the accuracy of your results - We calculate this by the formula [(measured-accepted)/accepted] x 100
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-These metals are located in group 2 -A harder and stronger and less reactive metal
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- A substance made of 2 or more elements - Water (H2O) and salt (NaCl) are this but oxygen (O2) is not
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- The number of protons in the nucleus atom - It determines the chemical properties of an element
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- A substance that is made of 1 kind of atom - Examples of this substance are lithium, carbon, cobalt, and many more (118 to be exact!)
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- Another word for this is families in the periodic table - There are 18 of these that go vertically
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-These gases are located in group 18 - Does not react with other atoms and molecules
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- Two or more atoms held together by chemical bonds - Carbon is not this, but oxygen and water are...
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- Atoms that have the same number of protons but a different number of neutrons - Carbon-12, carbon-13, and carbon-14 are examples of these
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- Properties that describe how atoms and molecules mix and interact with one another - A new substance must be formed after a __________ change
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- Another word for this is rows in the periodic table - There are 7 of these that go horizontally