What is an atom?
smallest component of an element
What are the three subatomic particles?
Proton, electron, neutron
What does a Bhor Model show?
how all electrons are populated
How many e- does the S hold in electronic configuration?
2 e-
How many e- does the P hold in electronic configuration?
6 e-
How many e- does the D hold in electronic configuration?
10 e-
How many e- does the F hold in electronic configuration?
14 e-
How many e- does the 1st shell hold in Bhor models?
2 e-
How many e- does the 2nd shell hold in Bhor models?
8e-
How many e- does the 3rd shell hold in Bhor models?
8e-
What is the mass of an electron?
1/2,000
Where are electrons located?
electron cloud
What is the mass of a proton?
1
What is the mass of a neutron?
1
How do you calculate the mass of an atom?
proton + neutron
Where are both protons and neutrons found?
nucleus
How many arrows are in one box for a box diagram?
two
how many electrons should each atom have in a Lewis Dot structure?
8 e- (Hydrogen only needs 2)
What electrons do you use for a Lewis dot?
only valence e- (group #)
What makes an equation balanced?
Both sides are equal (same number of each atom on both sides)
What is equilibrium?
rate of forward reaction = rate of backward reaction
What is an exothermic reaction?
releases heat
Is H positive or negative in exothermic?
negative