Atomic Structure Worksheet

The 3 particles of the atom are: a. ________________ b. ________________ c. ________________ Their respective charges are: a. ________________ b. ________________ c. ________________

• Particles: a. Proton, b. Neutron, c. Electron; Charges: a. Positive, b. Neutral, c. Negative

• Particles: a. Electron, b. Proton, c. Neutron; Charges: a. Negative, b. Positive, c. Neutral

• Particles: a. Neutron, b. Electron, c. Proton; Charges: a. Neutral, b. Negative, c. Positive

• Particles: a. Proton, b. Electron, c. Neutron; Charges: a. Positive, b. Negative, c. Neutral

The number of protons in one atom of an element determines the atom’s ________________, and the number of electrons determines ________________ of and element.

• identity, chemical properties

• mass, reactivity

• charge, atomic number

• volume, stability

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.

• protons, electrons, same

• electrons, neutrons, different

• neutrons, protons, similar

• protons, neutrons, identical

The ________________ of an element is the average mass of an element’s naturally occurring atom, or isotopes, taking into account the ________________ of each isotope.

• atomic mass, abundance

• atomic number, charge

• mass number, volume

• isotope, density

The ________________ of an element is the total number of protons and neutrons in the ________________ of the atom.

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 ________________.

Give the symbol and number of protons in one atom of: Lithium (a)  

Give the symbol and number of protons in one atom of: Iron

(a)  

Give the symbol and number of protons in one atom of: Oxygen

• O, 8

• Ox, 16

• O2, 6

• Og, 10

Give the symbol and number of protons in one atom of: Krypton

(a)