Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
vocab 9-17-24
| Term | Definition |
|---|---|
| atom | the smallest unit of matter consisting of a nucleus (protons & neutrons) & electrons in shells |
| element | a substance made of only one type of atom, identified by its atomic number on the periodic table |
| atomic number | the number of protons in the nucleus of an atom, determining the element's identity |
| atomic mass | the weighted average mass of an element isotope, usually found below the element's symbol |
| group | a vertical column on the periodic table, where elements have similar chemical properties & the same number of valence electrons |
| period | horizontal row on the periodic table. Elements in the same period have the same number of electron shells |
| valence electrons | the electrons in the outermost shell of an atom that determine how it reacts chemically |
| metals | elements that are typically shiny, malleable, conductors of heat & electricity, found on the left side of the periodic table |
| nonmetals | elements that are poor conductors of heat & electricity, often brittle. Right side of periodic table |
| metalloids | elements that have properties of both metals & nonmetals, often found a long the "stair-step" line between metals & nonmetals |
| alkali metals | elements in group 1 (except hydrogen) they are highly reactive & have on valence electron |
| alkaline earth metals | elements in group 2. They are reactive & have two valence electrons |
| Halogens | elements in group 17, they are highly reactive nonmetals with seven valence electrons |
| transition metals | elements in group 3-12 known for forming colorful compounds & having variable oxidation states |
| noble gases | elements in group 18. They are inert (non reactive) because they have a full set of valence electrons |
| lanthanides | a series of elements from atomic numbers 57-71, found in the first row of the f-block |
| actinides | a series of elements from atomic number 89-103, located in the 2nd row of the f-block RADIOACTIVE |
| isotope | atoms of the same element with the same number of neutrons |
| ion | an atom or molecule with a net electric charge due to the loss or gain of electrons |
| electron configuration | the distribution of electrons in an atoms orbitals, often represented using the periodic table |
| molecule | two or more atoms chemically bonded together |
| compound | a substance made from two or more different elements chemically bonded |
| periodic law | the principle that the properties of elements repeat periodically when arranged by atomic number |
| reactivity | the tendency of an element to engage in chemical reactions, influenced by its electron configuration |
Created by:
444everrjos
Popular Physical Science sets