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Chem Set 1
Atomic Structure and PT
| Question | Answer |
|---|---|
| Alkali metals | Group 1 on the PT, MOST reactive METALS on PT |
| Alkaline earth metals | Group 2 on the PT, VERY reactive metals but not as much as Group 1 |
| Atom | the smallest type of matter |
| Atomic Mass | the mass of an atom, approximately the number of protons plus the number neutrons |
| Atomic Number | the number of protons in each element; identifies the atom on PT |
| Group/Family | a.k.a. columns, vertical on the PT...18 of them |
| Halogens | Group 17, MOST very reactive of all nonmetals |
| Inert | unable to react chemically |
| Electron | the negative charge of an atom, OUTSIDE the nucleus |
| Metalloids | Sometimes act like metals and sometimes like nonmetals, Found on both sides of the STEPLADDER of the PT |
| Metals | Elements that are hard, ductile, malleable, and good conductors of heat and electricity |
| Neutron | the neutral charge of an atom, INSIDE the nucleus |
| Nonmetals | elements that do not have the physical and chemical properties of metals, mostly gases, dull & brittle solids, & are not conductive |
| Nucleus | the center of an atom |
| Proton | the positive charge of an atom, INSIDE the nucleus |
| Transition metals | groups 3 |
| Valence electron | The outermost electrons in an atom, Used in chemical bonding |
| Synthetic element | man-made element using a particle accelerator |
| Semiconductor | a material that conducts electricity under some conditions but not others |
| Period | a.k.a. rows, horizontal on the PT….7 of them |
Created by:
jhandy8
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