Atomic Model
If hydrogen is in the first row and first column, how many rings will it have?
One
How many protons does Hydrogen have?
1
What is an isotope?
A variation of an element that changes the number of neutrons, but not the number of protons
Calculate the elemental atomic mass of Mg if the naturally occurring isotopes are 24Mg, 25Mg and 26Mg. Their masses and abundances are as follows:
Isotope Atomic Mass Isotopic Abundance
24Mg 23.98504 u 78.70%
25Mg 24.98584 u 10.13%
26Mg 25.98259 u 11.17%
24.31 u
Draw the lewis dot diagram for hydrogen
H.
What is the maximum number of valence electrons an element can have?
8
If irons atomic mass is 56, and it has 26 protons, how many neutrons does it have?
30 neutrons
The atomic mass changes in an isotope (T/F)
True
Draw the lewis dot diagram for Boron
.B.
.
If copper is in the 4th row and 11th column, how many valence electrons and rings will it have?
4 rings and 1 valence electron
How many electrons does chlorine have?
17 electrons
if carbon’s atomic number is 6 and atomic mass is 12, what is the average atomic mass of carbon 14?
14
Draw the lewis dot diagram for Helium
He.
.
If Rubidium is in the 5th row and 1st column, how many rings and valence electrons will it have?
5 rings and 1 valence electron
How many protons, neutrons, and electrons does gold have
P:79, N:118, E:79
if carbon’s atomic number is 6 and atomic mass is 12, how many neutrons does carbon 14 have?
8
Draw the lewis dot diagram for Radon
..
:Rn:
..
If Helium is in the 1st row and 18th column, how many rings and valence electrons will it have?
1 ring and 2 valence electrons
What is the average atomic mass of Krypton?
84
If copper’s atomic number is 29, and average mass number is 64, what is the number of protons in copper-31?
29
What do the dots represent on the Lewis Dot Diagram?
Valence Electrons