States of Matter
Elements, Compounds, & Mixtures
Chemistry Math
Physical vs. Chemical
Nuclear Chemistry
100
What state of matter has a DEFINITE shape and DEFINITE volume?
Solid
100
What is a pure substance that cannot be broken down into other substances by chemical or physical means?
element
100
All known numbers plus one estimated number are known as this.
Significant Figures
100
A chemical change is a change in which one or more substances combine or break apart to form __________ _______________.
New substances
100
This subatomic particle determines the identity of an atom.
proton
200
Which state of matter has NO definite shape and NO definite volume?
gas
200
What is a pure substance made of 2 or more elements chemically combined, which can only be separated by CHEMICAL means?
Compound
200
Answers that are obtained by multiplication and/or division should be rounded so the answer has this.
The total number of sig. figs. that matches the measurement with the least total number of significant figures.
200
Provide an example of a physical change.
Examples: Ripping a piece of paper, crushing a can, dissolving salt in water, etc.
200
The mass number of an atom is found by adding these.
protons and neutrons
300
Which state of matter has a definite volume and will take the shape of the container it is in?
liquid
300
What are 2 or more substances that are physically together but not chemically combined?
Mixture
300
Express 0.031208 in scientific notation.
3.1208 x 10^-2
300
Provide an example of a CHEMICAL CHANGE.
Examples: Combustion, rusting (oxidation), tarnishing, frying an egg, baking a cake, bananas turning brown, etc.
300
An isotope is the same element with a different number of what particle?
neutrons
400
If we heat up (add energy to) a substance, this increases between particles.
Speed and/or distance
400
What is the difference between homogenous and heterogeneous mixtures?
Homogeneous mixtures look the same throughout. Heterogeneous mixtures do not look the same throughout ( different parts are visible).
400
When 2.15 and 3.176 are added the answer with the correct number of significant figures is.
5.33 (rounded from 5.326)
400
Name AT LEAST 3 indicators of a chemical change.
* Change in color * Change in odor * Change in temperature * Formation of bubbles * Formation of a solid (or any new substance for that matter)
400
Determine the number of neutrons in C-13.
7 neutrons
500
In general, this is needed to cause matter to change from a liquid into a gas.
An input of energy.
500
Provide an example of an element, compound, and mixture. (Must be labeled correctly.)
Answers will vary.
500
Convert 3.154cm into m.
0.03154 m
500
What is the principle that the total amount of matter is neither created nor destroyed during any chemical or physical change?
Law of Conservation of Mass
500
This type of decay results in the release of a Helium nucleus.
alpha decay
M
e
n
u