Electron Configurations
Atomic Theory
Scientific Inquiry
Atomic Structure
Periodic Trends
100
Name the following rule:
States that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy, then they fill subshells of higher energy.
Aufbau Principle
100
Name the following atomic model:
Bohr model
100
How many significant figures are in the following number - also name the rule(s) applied.
0.00405
3 Sig figs
1. Zeros to the left don't count
2. Zeros in between two sigfigs count.
100
How many valence electrons does Bromine have?
7 valence electrons
100
Name the most electronegative element
Fluorine
200
The following electron configuration belongs to what element:
[Rn] 7s25f11
99 - Einsteinium
200
Scientists: His model showed that electrons can only occupy certain energy levels.
Bohr
200
What is the number of sig figs in the number below? 0.0006760
4
200
How many electrons does the following have:
Ti+4
18
200
This periodic trend increases from right to left going across a period.
Atomic radius
300
Determine what is WRONG in the following electron configuration:
1s22s22p63s23p64s24d104p51s22s22p63s23p64s23d104p5
300
Name the difference between a Bohr model and an electron cloud model. Also, who developed which model?
Bohr model says electrons move in specific orbitals, electron cloud model says they move randomly within their clouds/energy levels.
Bohr model - Bohr
Electron Cloud Model - Schrodinger
300
What format is usually used to write a hypothesis?
If...then...because
300
What is the atomic mass of an element with 22 protons, 20 electrons, and 24 neutrons?
Atomic mass: 46
300
The energy required to remove an electron from an atom is called
Ionization energy
400
[Ra] 7s25f8
Ra is not a noble gas --> [Rd] 7s25f8
400
Scientist: His theory proposed that the positive charges of an atom are in the nucleus.
Rutherford
400
Scientists find evidence by conducting _________ and making __________.
experiments - observations
400
What is the difference between Uranium-235 and Uranium-238?
Their mass number, one is an isotope.
400
Which one has a larger radius? Na or Na+ WHY?
Na
500
What is the abbreviated electron configuration of Gold.
[Xe] 6s1 4f14 5d10
500
Scientist: His discoveries included subatomic particles called neutrons.
Chadwick
500
Calculate the following and use the correct number of Sig Figs to give the answer.
9.0-5.778
3.2
Addition/subtraction: Least precise
500
What is the difference between Cu+1 and Cu+2? What are the called?
Cu+1 has 28 electrons
Cu+2 has 27 electrons
They are called Ions
500
This group of elements does not have any electronegativity
Noble gases