| Question | Answer |
| Alkali Metals | located in group I
physical properties
soft, silvery, most reactive, only found combined with other elements |
| Alkaline Earth Metals | located in group II
physical properties
hard, bright white, good conductors
chemical properties
very reactive, only found combined with other elements |
| Chemical Reaction | a process in which the starting substance (reactants) change into new substances (products) |
| Chemistry | the branch of science that deals with matter, the properties of matter, the properties of matter, and the way in which matter interacts |
| Chemical Properties | a characteristic of a substance that determines how it interacts with other substances |
| Chemical Change | a change in matter that produces a new substance |
| Chemically: Reactive or "Reactive" | combines with other substances to form new substances |
| Element | a substance that cannot be broken into simpler substances by chemical or physical processes |
| Forms Compounds | two or more elements join together to form a new substance |
| Group/Family | vertical column on the Periodic Table of elements
18 groups, elements in the same group share properties |
| Halogen Groups | located in the group XVII
chemical properties
very reactive, dangerous to humans |
| Mixture | two or more substances mixed together |
| Metals | elements that display metallic properties
physical properties
hard, shiny, malleable (bendable), ductile, high melting points, solid at room temperature
chemical properties
wide range of reactivity |
| Metalloids | elements that have some characteristics of both metals and nonmetals
physical properties
conducts electricity under certain conditions
chemical properties
often combines with oxygen |
| Nonmetals | elements that do not display metallic properties
physical properties
dull, brittle, low boiling points, lower densities
chemical properties
readily form compounds, gain or share electrons |
| Noble Gases | located in group XVIII
chemical properties
stable, nonreactive, usually don't form compounds |
| Products | a substance produced in a chemical reaction |
| Property | a characteristic of a substance |
| Physical Property | a characteristic of a substance that can be observed without chemically changing the substance |
| Physical Change | a change in the appearance of a substance, but a new substance is not created |
| Precipitate | the solid that is left after a liquid evaporates |
| Periodic Table | a way to organize the elements based on atomic number of elements: and chemical property (from the simplest element to the most complex) |
| Reactants | a starting substance(s) in a chemical reaction |
| Substance | a type of matter defined by a unique (one of a kind) particle |
| State or Phase of Matter | the form in which matter exists can be: solid, liquid, gas |
| Transition Metals | located in group III-XII
physical properties
hard, shiny, good conductors
chemical properties
fairly stable, reacts slowly or not at all with air/water |
