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
atoms and periodic
unit 3, lesson 1,2
| Term | Definition |
|---|---|
| atom | the smallest particle into which an element can be divided and still be the same element |
| electrons | the negatively charged particles |
| nucleus | a small, dense center that has positive charge and is surrounded by moving electrons |
| protons | the positively charged particle |
| neutrons | the nucleus contains uncharged particles |
| electron cloud | the current theory, electrons don't move within an area around the nucleus |
| atomic number | the number of protons in the nucleus of an atoms |
| mass number | the total number of protons and neutrons in an atom's nucleus |
| periodic table | arrangement of elements |
| chemical symbol | an abbreviation for the elements name |
| average atomic mass | an atom is the weight average of the masses of all the naturally occurring isotopes of that elements |
| metals | elements that are shiny and conduct heat and electricity well |
| nonmetals | poor conductors of heat and electricity |
| metalloids | elements that have the same properties are often dull and brittle |
| group | a vertical column of elements on the periodic table |
| period | a horizontal row of elements on the periodic tble |
Created by:
18bmartinez0209
Popular Physical Science sets