| A | B |
|---|
| Mass number | Sum of the protons & neutrons of the nucleus |
| Atomic number | The number of protons in the nucleus-identifies the element |
| Alloy | Metal soulution of solids dissolved in liquids |
| Solubility | Amount of solute that can be completely dissolved in angiven amount of solvent at a specific temperature |
| Homogeneous | Appears to be the same throughout; "well mixed" |
| Heterogeneous | Doesn't appear to be the same throughout; "least mixed" |
| Solute | Always has a substance that is dissolved |
| Solution | Homogeneous mixture of 2 or more substances in a single, physical state; "best mixed' |
| Mixture | 2 or more substances mixed together, but not chemically combined |
| Hypothesis | Proposed solution |
| Noble Gases | Family 18; _______, full outer energy level so are normally unreactive |
| Transition Metals | Families 3-12; _____ metals, most have 1 or 2 valence electrons |
| Alkaline metals | Family 2; ______ metals, 2 valence electrons & very reactive |
| Alkali metals | Family 1; _____ metals, 1 valence electron & very reactive |
| Periods | Horizontal rows are ________ & have NO properties alike |
| Group or families | Vertical columns of elements-elements in the same _____ __ ________ have similar but not identical properties |
| Molecule | Smallest particle of a compound that has all the properties of that compound |
| Compound | A pure substance that's made of more than 1 element-chemically combined |
| Atom | Smallest particle of an element that has the properties of that element |
| Element | Can't be changed into a simpler substance by heating or by any chemical process |
| Chemical Change | Changes that the subject undergo's when they turn into other subjects |
| Chemical Properties | Describe how a subject changes into other new subjects |
| Physical Properties | Characteristics that can be obesrved without changing the identity |
| Vaporization | Liquid to gas |
| Sublimation | Solid to gas |
| Condensation | Gas to liquid |
| Freezing | Liqui to solid |
| Melting | Change of a solid to a liquid |
| Gravity | A force of attraction that depends on the mass of 2 objects & the distance between them |
| Weight | The pull of gravity on an object |
| Inertia | The resistance of an object to changes in its motion |
| Mass | Anount of matter in an object |
| Properties | Characteristics that describe an object |
| Matter | Anything that has mass & volume |
| Conversion factor | A fraction that can always = 1 |
| Demensional analysis | The skill of converting one unit to another |
| Density | Mass/volume |
| Volume | The amount of space an object takes up |
| Scientific method | Systematic approach to problem solving |
| Law | Summerizes observed experimental facts but does not explain the facts |
| Theory | The most explanation for events that occur in nature |
