Question | Answer |
Mass | The measure of the amount of matter in an object. |
Matter | Anything that has mass and take up space. |
Atom | The smallest piece of matter that has physical and chemical properties. |
Element | A pure substance that is made of only one type of atom. |
Extensive Property | Depends on the amount of matter present |
Intensive Property | Doesn't depend on the amount of matter present |
Physical Change | A change in substance that does not involve a change in the identity of the substance |
Physical Property | A characteristic that can be observed without changing the chemical identity. |
Endothermic | Energy being absorbed. |
Solid | Definite Shape and Definite Volume |
Plasma | High temperature physical state of matter in which atoms lose most of their electrons. |
Chemical Property | A substance ability to undergo changes that transform it into different substances. |
Chemical Change | A change in which one or more substances is converted into a different substance. |
Group | Vertical columns and similar reactivity. |
Period | Horizontal rows that do not have similar properties. |
Metal | Malleable, Ductile, Luster,Good Electric Conductors, & Good Heat Conductors |
Nonmetal | Most are gases at room temperature, solids are brittle, and poor conductor of heat and electricity. |
Metalloid | Between metals and nonmetals, have characteristics of metal and nonmetals, and solids at room temperature. |
Liquid | Definite Volume but an indefinite shape. |
Gas | No definite volume or shape. |
Compound | A substance made from two or more elements that are chemically bounded. |
Ectothermic | Energy being released. |
Mixture | A blend of two or more kinds of matter. |
Homogenous Mixture | Mixtures that are uniform in composition. Solutions. |
Heterogenous Mixture | Mixtures that are not uniform in composition. |
Pure Substance | Has a fixed composition and exactly the same properties. |
Noble Gases | Unreactive Elements and Gases at room temperature. |
What is the Scientific Method? | 1. Observing and Collecting Data 2. Formulating Hypothesis 3. Testing Hypothesis 4. Formulating Theories |
Comparing Mass and Weight | Mass is the measure of the amount of matter in an object. Weight is the gravitational pull. |
Density | Mass X Volume |
kg/m3 or g/cm3 = ? | g/mL |
Conversion factors always equal what | 1 |
In conversions the numerator is always equal to what? | The denominator. |
Accuracy is what? | Hitting your target. |
Precision | How close the trials are to each other. |
l o (observed) - a (accepted) l | Absolute Error |
Ea (Absolute Error) / A (accept) x 100 =? | Percent Error or Relative Error |
Sig Figs are ?? | Significant Figures |
Non zero intergers | Always count |
Leading Zeros | Never Count |
Captive Zeros | Always count |
Trailing Zeros | Only count with a decimal point |
Exact Numbers (Determined by Counting i.e. 5 Dogs) | Are infinite |
When multiplying and dividing sig figs | Fewest sig figs |
M x 10 ^ n | Scientific Notation |
Direct Porportions | Two quantities are directly proportional to each other. |
Inverse Porportions | Two quantities are inversely proportional to each other if their product is constant. |