StudyBrix / Three-level worksheets / Grade 9 Chemistry worksheet Grade 9 · Science · three levels
Grade 9 Chemistry worksheet in three levels The same 20-question worksheet on chemistry in Support, Core and Challenge versions. Question by question, each version keeps the topic and changes the difficulty.
Compare the three levels
Questions 20 (20 medium)
Grade range Grades 8 to 12
Topics Chemistry Sample questions In a simplified isotope exercise, atomic number Z = 10 and mass number A = 29. How many neutrons? In a simplified isotope exercise, atomic number Z = 5 and mass number A = 6. How many neutrons? In a simplified isotope exercise, atomic number Z = 12 and mass number A = 27. How many neutrons?
Questions 20 (20 medium)
Grade range Grades 8 to 12
Topics Chemistry Sample questions In a simplified isotope exercise, atomic number Z = 26 and mass number A = 32. How many neutrons? In a simplified isotope exercise, atomic number Z = 24 and mass number A = 33. How many neutrons? In a simplified isotope exercise, atomic number Z = 8 and mass number A = 42. How many neutrons?
Questions 20 (20 challenge)
Grade range Grades 9 to 12
Topics Chemistry Sample questions A hypothetical element has isotopes of mass 19 u (55%) and 23 u (45%). Calculate its mean atomic mass in u. A hypothetical element has isotopes of mass 80 u (15%) and 83 u (85%). Calculate its mean atomic mass in u. A hypothetical element has isotopes of mass 78 u (85%) and 79 u (15%). Calculate its mean atomic mass in u. Using the three versions Start everyone with the same short explanation, then hand out Support, Core or Challenge. Question numbers line up across the versions, so you can go through the answers with the whole class. The PDF has a cover page and each version on its own pages; the answer keys PDF has all three keys. See the original worksheet or browse more three-level worksheets .