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Chemistry QA

QuestionAnswer
what can be Observed without changing the measured without changing the identity of the substance? Physical Properties
What is a change that doesn't involve the identity or substance? Physical Changes
What is the ability of a substance to cause or undergo a chemical reaction? Chemical Properties
What is the change when one or more substances convert into new ones? (reactants and products) Chemical Change
What change depends on the amount of present matter like mass, volume, size, and energy? Extensive Change
What change does not depend on the amount present like boiling point, freezing point, and density? Intensive Change
What does a pure substance contain? It contains a single component
What does a mixture contain? A blend of two or more components together, but both have their own identity.
What are the metals and nonmetals separated by? The metalloid stairway. Metals are on the left nonmetals are on the right.
How do we find density? Density = Mass/Volume
How is density often recorded? grams/centimeters^3
What did the Cathode ray tube discover? Everything has electrons, and electrons are NEGATIVE
What did the oil drop experiment discover? the charge and charge to mass ratio of the electron
What did the plum pudding model discover? Negative electrons were spread evenly throughout a positive charge in the rest of the atom
What did the gold foil experiment discover? Something was dense and heavy in the atom, it was the nucleus
What do protons determine? The identity of an element
What does the neutron contain? It contains the neutrons and protons
What do the electrons determine? Chemical behavior
Where do u find the number of protons in an element? The bottom of the chemical square
What does the mass number determine? The number of protons and neutrons together. at the top of the chemical square.
What are the same and which is different? Protons and electrons are the same. You find the neutrons by taking the mass number minus the protons.
How do you find average atomic mass? You multiply the percent by the atomic mass, then you add them all together.
How do you find the molar mass? g-mol- atom conversions
Created by: waltersmo
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