Name _________________________________________
1. Complete the table below.
Sub-particle of the atom:
Respective Charge:
Location:
2. The atomic number tells you the number of _____________________in one atom of an
element. It also tells you the number of _______________ in a neutral atom of that element.
The atomic number gives the “identity” of an element as well as its location on the
Periodic Table. No two different elements will have the _____________ atomic number.
3. The ______________________of an element is the total number of protons and neutrons in
the______________________ of the atom.
4. The mass number is used to calculate the number of ________________ in one atom of an element.
In order to calculate the number of neutrons you must subtract the ___________________from the
________________ ________________.
5. Give the symbol and number of protons in one atom of:
Lithium __________________
Iron __________________
Oxygen __________________
Hydrogen __________________
Bromine __________________
Copper __________________
Mercury __________________
Helium _____________________
6. Give the symbol and number of electrons in a neutral atom of:
Potassium __________________
Boron __________________
Aluminum _________________
Chlorine __________________
Iodine __________________
Lead ______________________
7. Give the symbol and number of neutrons in one atom of:
(To get mass number you must round the atomic mass to the nearest whole number.
Show your calculations.)
Silver __________________
Carbon __________________
Fluorine __________________
Gold __________________
Hydrogen __________________
Magnesium __________________
8. Name the element which has the following numbers of particles:
Protons
7
16
22
1
47
37
Neutrons
7
16
25
0
60
48
Electrons
7
16
22
1
47
37
Element
9. Draw a diagram of a atom on the back of this worksheet. Include the following:
atomic nucleus, electron cloud, proton, neutron, and electron.