Name: ______Per:______Date:______

Numerically Describing Atoms

Fill in the graphic organizers for both isotopes and ions

Isotope

Ions

Answer the following questions:

  1. How many protons and electrons are in a vanadium atom?
  1. How many protons and electrons are present in a nitrogen atom?
  1. How many protons and electrons are present in an argon atom?
  1. How many protons and electrons are present in a potassium atom?
  1. How many protons and electrons are present in a platinum atom?
  1. How many protons, neutrons and electrons are present in the ion?
  1. How many protons, neutrons and electrons are present in the ion?
  1. Write the isotopic symbol for the ion with 84 protons, 125 neutrons and 80 electrons.
  1. Write the isotopic symbol for the ion with 27 protons, 32 neutrons and 25 electrons.
  1. Write the isotopic symbol for the ion with 31 protons, 39 neutrons and 28 electrons.

Complete the following table:

isotopic symbol / atomic number / mass number / protons / electrons / neutrons / charge / cation or anion? / Hyphen notation / Is this atom an isotope ion or both
1 / 63 / Cu+
29
2 / 8 / 15 / -2
3 / 24 / 23 / 27
4 / 25 / 10 / 13
5 / 26 / 13 / 10

Determine the average atomic mass of the following mixtures of isotopes.

______

  1. 80.% , 17% , 3%

______

  1. 50.% Gold- 197, 50.% Gold- 198

______

  1. 15% , 85%

______

  1. 99% , 0.8% , 0.2%

______

  1. 95%Nitrogen with 7 neutrons, 3%Nitrogen with 8 neutrons, 2% nitrogen with 9 neutrons

______

  1. 98% , 2%

______

  1. U-234 (0.0058%),U-235 (0.71%), and U-238 (99.23%).

Indicate the charge (+1, -1, etc) on the ions that are formed in the following situations. Record the resultant ion as a cation or anion.

Charge Cation/Anion

a. Lithium loses 1 electron ______

b. Oxygen gains 2 electrons ______

c. Magnesium loses 2 electrons ______

d. Nitrogen gains 3 electrons ______

Fill in the blanks:

The average atomic mass of beryllium is 9.012AMU. This means most common beryllium isotope has:

a mass of ______with ______p+______n0

The average atomic mass of cesium is 132.905AMU. This means most common Cs isotope has:

a mass of ______with ______p+______n0

Are other isotopes of Cs lighter or heaver? How do you know

The average atomic mass of copper is 63.54 AMU. This means that in any penny half the copper atoms weigh

______AMU while the other half weigh ______AMU. However

all the copper atoms in existence have ______p+

Think about it:

Draw what you think would happen if you passed the three types of radiation between a positively and negatively charged plate. Which way would the 2 particles and 1 ray bend if any, and how much would each of them bend?