Atoms
Name the 3 subatomic particles.
protons, neutrons, electrons
Lewis dot models only use ____________
Valence Electrons
elements are found on the _________
periodic table
__________ is 2 or more elements bonded together
compound
mixtures are easily ___________
separated
matter
Where do you find the number of valence electrons for each element
Elements are organized by ________
atomic number (number of protons)
H20 is the formula for
water
cereal is an example of what type of mixture
heterogeneous mixture
What subatomic particles are located in the nucleus
protons and neutrons
What 2 models did we learn about in class
lewis dot model and bohr model
How are symbols created for elements
1 Capital letter or 1 capital letter and 1 lowercase letter
2 or more atoms combined are
molecules
Solutions are uniform and called _________ mixtures
homogeneous
Where are electrons located
electrons are located outside the nucleus on the orbitals.
Where do you put valence electrons on the bohr model
the outer most shell (orbital)
Each element is unique and that is why each element has its own ______________
atomic number
compounds can be molecules, but not all molecules are compounds. True or False
True
mixtures are 2 or more substances put together, but they aren't ___________ like compounds.
bonded
what is the formula to find the number of neutrons
atomic mass - atomic number = neutrons
what is the max amount of electrons on the 3 rings of the bohr model.
third ring 8 electrons
group 18 of elements is called ________
noble gases
A compound must be chemically ___________
bonded
What is the universal solvent (dissolves the solute)
water