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$KINDERGARTEN EVERYDAY MATH – BASELINE RUBRIC$

Naming chemical compounds Now that you know how to write a chemical formula given the name of a compund, you need to know how to go backwards and name a compound given its chemical formula. You know how to write a formula for: Magnesium Phosphate Mg +2 (PO 4) -3 therefor it is: Mg 3(PO 4) 2 How would you write the name for: Cu(CrO 4)? Here are some steps that can help you name different compounds: I. Write the name of the first element or first polyatomic ion a. If the first element is a metal: Indicate the oxidation number of the metal with a roman numeral after the name of the element b. If the first element is not a metal: Specify the number of atoms of the second element according to the table: Prefix Number of atoms Mono 1 Di 2 Tri 3 tetra 4 penta 5 Hexa 6 Hepta 7 Octa 8 II. Write the name of the ion of the second element or polyatomic ion. Not all metals need the Roman numeral to specify the oxidation number, only those that can have more than one oxidation number. Alkali and Alkaline Earth metals (groups I and II) do not need the Roman numerals. Check the back of the periodic table to see if a certain metal needs it, or just add it to be safe to any metal. Example: Mg 3P 2 I. Write the name of the first element: Magnesium a. Magnesium is a metal in the second column so we do not need the roman numeral, but we can add it: II II. Write the name of the ion of phosphorous: phosphide Answer: Mg 3P 2 is Magnesium II phosphide
Example: CO I. Write the name of the first element: Carbon b. Carbon is a non-metal. There is only one atom of oxygen, so we write: mono II. Write the name of the ion of oxygen: oxide Answer: CO is Carbon monoxide Example: CO 2 I. Write the name of the first element: Carbon b. Carbon is a non-metal. There are two atoms of oxygen this time, so we write: di II. Write the name of the ion of oxygen: oxide Answer: CO 2 is Carbon dioxide Example: Cu(CrO 4) I. Write the name of the first element: Copper a. Copper is a metal. We need to find the oxidation number, since copper can be +1 or +2. Find the oxidation number of the polyatomic ion next to copper. From the back of your periodic table is -2. Since the compounds must be neutral and there is only one atom of copper, Cu must be +2. Write: II II. Write the name of the polyatomic ion (look for it in the back of your periodic table): Chromate Answer: Cu(CrO 4) is copper II chromate Example: (NH 4) 3(PO 3) I. Write the name of the first polyatomic ion Ammonium No need to add roman numeral, since ammonium is not a metal, but no need to add a prefix either, since ammonium is not a non-metal element. Notice that ammonium is the only polyatomic cation. II. Write the name of the polyatomic ion (look for it in the back of your periodic table): Phosphate Answer: (NH 4) 3(PO 3) is Ammonium phosphate
Page 1 and 2: Learning Goals Unit 4: Copper lab,
Page 3 and 4: SECOND DAY We will continue working
Page 5 and 6: Observations before reaction Observ
Page 7 and 8: Next reaction 3) Put a pre-cut piec
Page 9 and 10: 1) Percent recovery is a term used
Page 11: Describe with words any observed pa
Page 14 and 15: Write the group # the ions are in o
Page 16 and 17: Practice Writing Formulas with the
Page 18 and 19: Practice makes perfect! The third r
Page 22 and 23: It is your turn to practice. The fo
Page 24 and 25: Identification of elements, ions an
Page 26 and 27: Chemical Change Lab - Five Fabulous
Page 28 and 29: 3. How many products are present an
Page 30 and 31: What type of reaction is this? Ther
Page 32 and 33: Practice identifying types of react
Page 34 and 35: B. Heating of a metallic chlorate:
Page 36 and 37: compound1 + compound2 Compound3 + c
Page 38 and 39: 3. The reaction of hydrogen and nit
Page 40 and 41: Follow the instructions for previou
Page 42 and 43: Types of Reactions Combination: A +
Page 44 and 45: Decomposition subtypes When there i
Page 46: 6. Describe how to use gravity filt

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