Parts of an Atom
The Periodic Table
Periodic Trends
Average Atomic Mass
Atomic Models
100
Electrons have this type of charge
What is negative?
100
The atomic number is equal to the number of these
What are protons?
100
Atomic radius will do this when you go down a group.
What is increase?
100
Identify the two atoms that are isotopes of each other
100
This scientist concluded that the atom looks like plum pudding
JJ Thomson
200
Protons have this type of charge
What is positive?
200
These two subatomic particles make up the mass number
What are protons and neutrons?
200
This is the reason why atomic radius decreases as you go left to right across a period.
The number of energy levels stays constant, but the increasing positive charge in the nucleus draws in the outermost energy level more.
200
Isotopes have a different number of these
Neutrons
200
This scientist concluded that the electrons travel in orbits and exist in different energy levels or shells
Niels Bohr
300
Neutrons have this type of charge
What is none? (neutral)
300
The number of electrons in Aluminum in its neutral state
What is 13?
300
This is how a cation forms
What is removing electrons?
300
Write out the formula for average atomic mass
((%1)(mass1) + (%2)(mass2) +...+(%n)(massn))/100
OR
(f1)(m1) + (f2)(m2) + ... + (fn)(mn)
300
Explain the experiment that was used to help Rutherford make his conclusion
Gold foil experiment: Shot positive alpha particles through a sheet of gold atoms -- some bounced back, some straight through, some deflected. Demonstrated that atoms have a dense and positively charged nucleus
400
These two subatomic particles are located in the nucleus
What are protons and neutrons?
400
Oxygen has approximately this many neutrons.
What are 8 neutrons?
400
Out of the 2 elements below, this element has a higher electronegativity.
1. Iodine (I)
2. Chlorine (Cl)
What is Chlorine (Cl)?
400
This is the reason for why you cannot just take the regular average of all the isotopes
You wouldn't be accounting for the abundances of each isotope
400
What is the correct order of atomic models?
Dalton, Thomson, Rutherford, Bohr
500
Electrons are located in this part of the atom
What is orbitals/energy levels/around the nucleus?
500
This element is located in period 4, group 8
What is iron?
500
This is what happens to ionic radius as you go left to right across a period.
It decreases, then shoots back up when you get to the anions, then decreases again.
500
Calculate Average Atomic Mass for Boron
10B: 20%, 10amu
11B: 80%, 11amu
Average atomic mass = (%1)(mass1) + (%2)(mass2)
(0.2)(10) + (0.8)(11) = 10.8 amu
500
Which experiment was used to help a scientist discover that there are negatively charged particles in an atom? Explain this experiment
Cathode Ray tube: ray shot through a tube, the ray of particles was attracted to a positive magnet, showing that negative particles exist and are spread out through atoms
600
This is the number of protons in this element:
What is 10?
600
This is the group name for group 1A.
What are alkali metals?
600
This is the definition of ionization energy
What is the energy required to remove an electron from an atom?
600
The average atomic mass of Ag is 107.88 amu. It has 2 isotopes, Ag-106 and Ag-107. Ag-107 has an abundance of 51.839%. Calculate the abundance of Ag-106
48.16%
600
On your whiteboard, draw Thomson's atomic model.
