Atomic Models
This model proposed that atom were solid and positively charged, with electrons stuck in throughout.
Plum Pudding Model
How many electrons on a Cerium atom with a charge of 7+?
51 electrons
How Many Sig Figs?
0.0400870
6
Avogadro's magic number for how many particles are in a mole:
6.022 x1023
Create the Nuclear Symbol:
31 Electrons
40 Neutrons
33 Protons
7333As2+
Bohr placed electrons outside the nucleus into these to answer his question of why electrons don't crash into the nucleus.
Fixed Orbits
How many protons and neutrons in Neon-33?
10 Protons, 23 neutrons
When calculating with sig figs, you are limited to how many sig figs?
However many are in the least precise number
The average atomic mass is the same thing as the ______________ for pure elements
The Molar mass
Create the Nuclear Symbol:
88 Protons
133 Neutrons
93 Electrons
22188Ra5-
This was the first model of an atom, and so far the longest lasting.
Billiard Ball Model
What element would have 43 protons and 55 neutrons?
Technetium
When do zeros not count as sig figs?
Give an example of each scenario.
Not in front of the number!
Not behind without a decimal point!
Molar Mass of any gas @ STP?
22.4 L/mol
Create the Nuclear Symbol
44 Protons
44 Electrons
97 Neutrons
14144Ru
Put the atomic models in order from oldest to newest:
Rutherford, Plum Pudding, Billiard Ball, Quatum, Bohr
Billiard Ball, Plum pudding, Rutherford, Bohr, Quantum
How many protons, neutrons and electrons in an Sb cation?
P+= 51
N0=71
e-= 50
8.09006 x .007
Round your answer to the correct number of sig figs!
0.06
You have 5.25 moles of a substance. How many particles do you have?
3.16 x1024
Create the Nuclear Symbol
Tb-140 (Cation)
14065Tb+
Draw a diagram and label the quantum mechanical model
Diagram should include a nucleus and electron cloud
How many protons, neutrons and electrons in
181Os4-
Protons:76
Neutrons:105
Electrons:80
Sig figs contain any number of certain digits plus one of these
Uncertain digit
You have 8 moles of Ir, how many grams do you have?
1,537.6 grams Ir
Create the nuclear symbol
Chromium-52 (that gained 6 electrons)
5224Cr6-