Atomic structure Flashcards
What do solid particles look like?
close/ touching regular
What do liquid particles look like?
touching and random
What do gas particles look like?
Moving far apart in different directions
What movement do solid particles do?
vibrate lightly in a fixed position
What movement do liquid particles do?
roll over each other, change positions, stay touching
What movement do gas particles do?
move freely in all directions to spread out
What is a small group of atoms called?
a molecule
What is an element?
A substance containing only one type of atom
What is a compound?
A substance containing two or more elements which are chemically combined
What is a mixture/
Two or more elements, compounds that are not chemically combined or bonded so can easily be separated
What is an atom?
The smallest whole particle that exists. The building blocks for all other substances
What 3 things does an atom contain?
Proton, neutron and electron
What 2 things are equal in an atom?
Protons and electrons
What is the total number of protons and neutrons equal?
Mass number
How many electrons go in thefirest, second and third shell?
2,8,8
