This document provides information about atomic structure for different elements. It includes: - The mass number, atomic number, number of protons, neutrons, and electrons for oxygen, boron, and neon. - An explanation that the atomic number is the number of protons, which equals the number of electrons. The number of neutrons is calculated by subtracting the atomic number from the mass number. - A reminder that more practice problems on atomic structure can be found at the provided web address. - Two "element riddle" puzzles where the element names are used as puns to complete sentences.

3. -
+ +
Protons
-
Neutrons +
Electrons
-

5. Atomic number
Mass
8 Number:_______________
Number of
Protons:___________
The difference of number of neutrons in the nucleus
Number is the
Atomic
Symbol
O Neutrons:__________
3
Number of Electrons: ________
Subtract the atomic number (the # of protons= # of
electrons)from the mass number.
Oxygen
15.999
2
Round the atomic mass to the nearest whole
1

6. Mass Number:______16_______
8 Number of Protons:______8_____
Number of Neutrons:_____8_____
Number of Electrons: _____8_____
O
The difference is the number of neutrons in the nucleus
3
Subtract the atomic number (the # of protons= # of
electrons)from the mass number.
Oxygen
15.999
2
Round the atomic mass to the nearest whole
1

7. 5
Mass
Number:_______________
Number of
B Protons:___________
Number of
Neutrons:__________
Boron Number of Electrons:
_________
10.81

8. 5 Mass Number:______11________
Number of Protons:______5_____
Number of Neutrons:_____6_____
B Number of Electrons: _____5_____
Boron
10.81

9. 10 Mass Number:________20_______
Number of Protons:____10_______
Number of Neutrons:____10______
Ne Number of Electrons:
____10______
Neon
20.18

10. 10
Mass
Number:_______________
Number of
Ne Protons:___________
Number of
Neutrons:__________
Neon Number of Electrons:
_________
20.18

11. In Summary
For any element:
Number of Protons = Atomic Number
Number of Electrons = Number of Protons = Atomic
Number
Number of Neutrons = Mass Number - Atomic Number
For krypton:
Number of Protons = Atomic Number = 36
Number of Electrons = Number of Protons = Atomic
Number = 36
Number of Neutrons = Mass Number - Atomic Number =
84 - 36 = 48
Visit http://education.jlab.org/elementmath/index.html
for more practicing on protons, neutron, and mass number

12. Well then…
It’s Time for an Element
Riddle!!
Use the element name as a pun to complete these sentences.
"We brought everything
but the kitchen ______!"
Five times two is _____.

15. Table 1. Common Elements and Their Symbols
Al Aluminum Cu Copper O Oxygen
Sb Antimony F Fluorine P Phosphorus
Ar Argon Au Gold Pt Platinum
As Arsenic He Helium K Potassium
Ba Barium H Hydrogen Ra Radium
Be Beryllium I Iodine Si Silicon
Bi Bismuth Fe Iron Ag Sliver
B Boron Pb Lead Na Sodium
Br Bromine Li Lithium Sr Strontium
Cd Cadmium Mg Magnesium S Sulfer
Ca Calcium Mn Magnesium Sn Tin
C Carbon Hg Mercury Ti Titanium
Cl Chlorine Ne Neon W tungsten
Cr Chromium Ni Nickle U Uranium
P. 8 Co Cobalt N Nitrogen Zn Zinc

16. Well then…
It’s Time for ANOTHER
Element Riddle!!
Use the element name as a pun to complete these sentences.
" Dial 911 to call a _____ when you
witness a crime.
To park here you must put a _____ in the
meter.

17. P. 11

18. P. 11

19. P. 11