Module Two Assignment

Name:

Elements

Instructions: Using the periodic table, answer the following questions about elements.

• What is the atomic number for Carbon?
• What is the chemical symbol for Tungsten?
• What is the atomic number for strontium?
• What is the atomic number for mercury?
• What element has the symbol Ag?
• What element has the symbol Nb?
• What is the atomic number for gallium?

Atoms and Ions

Instructions: Answer the following questions regarding ions losing and gaining electrons.

• How many electrons does chlorine need to gain to become an ion? Will it become a positively charged cation or a negatively charged anion?
• How many electrons must nitrogen gain to become like its closest noble gas, Neon?
• What are valence electrons?
• Given that the mass number for carbon is 13, how many protons and how many neutrons does the isotope contain?
• Hydrogen has two naturally occurring isotopes: hydrogen-1 and hydrogen-2. What is the symbol for each of these hydrogen isotopes?
• How many neutrons are contained in nitrogen-15?
• How many protons does calcium-43 contain?

Instructions: Answer the following questions about isotopes.

Atomic Mass

Instructions:

• Find the atomic mass unit of Sulfur-32 with a mass of 31.972 and percent abundance 94.99%, Sulfur-33 with a mass of 32.971 and percent abundance 0.75%, Sulfur-34 with a mass of 33.968 and percent abundance 4.25%, and Sulfur-36 with a mass of 35.967 and percent abundance 0.01%.
• Find the atomic mass unit of Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976, 29.974, respectively. The percent abundance of the silicon isotopes is 92.2%, 4.7% and 3.1%, respectively.

Periodic Table and Its Trends

Instructions: Answer the following questions regarding the periodic table, the Bohr Model, and electron configuration.

• Explain periodic table.
• What is the Bohr Model? Provide a summary in your own words.
• What is the electron configuration of calcium?
• What is the electron configuration of oxygen?
• How many valence electrons does magnesium (Mg) have?

Molecules and Compounds

Instructions: Find the mass ratios and atomic ratios of the following compounds.

• CI₂O₇
• SbF₅
• NH₃
• BaI₂
• S₂Cl₂
• OsO₄
• Sodium chloride
• Potassium chloride
• Ammonium chloride
• Sodium hydroxide
• Calcium Nitrate
• MgCl₂
• CaCl₂
• CuSO₄
• Al₂O₃
• Cl₂O₇
• PCI₅
• SiI₄
• NI₃
• Sulfur hexafluoride
• Sulfur dioxide
• Dinitrogen trioxide
• Carbon tetrafluoride

Instructions: Write the formula for each of the following ionic compounds.

Instructions: Name the following ionic compounds.

Instructions: Name the following molecular compounds.

Instructions: Write the formulas for the following molecular compounds.