Johann Dobereiner's grouped elements in the periodic table into groups of _____?
3
decreases; increases
(s,d,f,p)
s,p,d,f
The arrows in orbital notation drawings represent ______ while the lines they are drawn on represent __________.
electrons, orbitals
In the flame lab, color was produced when electrons in excited atoms return to ___________ energy states
(higher or lower)
lower
John Newlands suggested that elements be arranged in ______
octaves
Which of the following is a metalloid?
S, Ga, Si, C
Si
How many electrons occupy the second principal energy level of a neutral atom of iron?
8
__________ rule/principle explains that no two electrons can be in the same state/ have the same directional spin
Pauli's exclusion principle
_______________ is the measure of the tendency of an atom to attract electrons when bonding.
electronegativity
Mendeleev ordered the periodic table by increasing ______ ______
atomic mass
True or false: metals are brittle, gasses at room temperature, and poor conductors of electricity
False
How many electrons occupy a full 2s orbital?
4
_________ rule/principle explains that an electron occupies orbitals in order from lowest energy to highest.
Aufbau
The atomic particles that determine chemical properties are __________
electrons
How did Henry Mosely arrange the periodic table?
increasing atomic number
Which element has a smaller ionization energy?
Br or Sn
Sn
Write out the electron configuration for Boron
1s22s22p1
__________ rule/principle explains that every orbital in a sublevel is singly occupied before any orbital is doubly occupied.
Hund's
Which period and block does iodine belong to?
5 and p
Why did Mendeleev get his periodic table published and well established?
He was able to use it to predict the physical properties of three elements that were not yet discovered
List the following elements in order of INCREASING (smallest to largest) electronegativity
S, Ge, Ag, Ba, F
This is the electron configuration for which element?
1s22s22p63s23p5
Chlorine
Draw the orbital notation for phosphorus
on the board
group