Basic Atomic Structure
Isotopes
Atomic Theory History
Average Atomic Mass
The Identity of an Atom
100
What is the charge of a proton?
positive
100
Isotopes of an element have the same number of ___________ but a different number of _______.
Protons neutrons
100
Which model do scientist shows the electron in rings outside the nueclus?
Bohr
100
What is the average atomic mass of Lithium?
6.941
100
What subatomic particle identifies and atom?
the proton
200
What 2 subatomic particles are found in the nucleus?
Proton and Neutron
200
How do you calculated the number of neutrons in an element?
Mass Number minus protons = neutrons
200
Which model is the first to show a dense nucleus?
Rutherford
200
What's the first thing you should do to find the average atomic mass for this problem?
Divide the % by 100
200
Are these elements the same?
no
300
Which 2 subatomic particles have the same mass?
Proton and Neutron
300
How many protons are in this element?
19
300
Which model shows the electrons in a "cloud"?
Modern/Schrodinger
300
The average atomic mass for this element should be between what 2 numbers?
24 and 26
300
Which of these are the same atom?
Yes
400
What is the charge of the nucleus of an atom?
Positive
400
How many neutrons are in Nitrogen-15?
8
400
Which model shows these merits and limitations?
Merit: Dense nucleus, protons in the nucleus, atom is mostly empty space
Limitations: No neutrons, incorrect movement of electrons
Rutherford
400
Which isotope would have the greatest affect on the average atomic mass?
J-66
400
If the pink circle represents the proton, is this still the same element?
No
500
How many electrons are in this element?
80
500
How many neutrons are in this element?
8
500
Why do we mostly use the Bohr model in class?
Its easy to see all the subatomic particles and their location
500
How is calculating average atomic mass like calculating your overall grade in class
The isotope with the greatest % abundance would be like test grades and have the greater affect on the overall grade.
500
Lithium has 3 protons. It gains 2 more protons, what element is it now?
Boron