SCH4U Graded 12 CHemiStry Final exam review exam
2026 UPdate witH COmPlete QUeStiOnS and COrreCt
detailed anSwerS (veriFied anSwerS) |already Graded
a+|Brand new verSiOn!!
What are the main ideas of the Dalton (Billiard Ball) model? - anSwer-1. All matter is made up of
tiny indivisible particles called atoms
2. All atoms of the same element are the same in size, mass, etc
3. Atoms of different elements are different in size and mass
4. Atoms of different elements combine in small whole number ratios to form molecules or
compounds
5. In chemical reactions, atoms are not created or destroyed, they are bonded or un-bonded
What are the main ideas of the Thomson (raisin bun) model? - anSwer-1. The atom is a
spherical cloud of positive charge with negatively charged electrons embedded in it
2. The amount of positive charge must equal the amount of negative charge so the atom is neutral
What are the main ideas of the Rutherford model? - anSwer-1. Discovered using the gold foil
experiment
2. The atom is mostly empty space
3. Most of the mass is concentrated in a small, dense nucleus
4. Electrons move around the nucleus like planets around the sun
5. Problem with this model is that the e revolving around should emit radiation and lose NRG,
slow down and spiral down and ultimately fall into the nucleus. This is UNTRUE
What are the main ideas of the Bohr (energy level) model? - anSwer-1. electrons must travel
around the nucleus in specific energy levels
2. If an atom is excited, electrons absorb a certain amount of energy and are boosted to a higher
energy level
3. electrons later drop back down to a lower state releasing energy of a colour equal to the
amount of energy released
4. the number of e in each energy level, n, is equal to 2n^2
2026 UPdate witH COmPlete QUeStiOnS and COrreCt
detailed anSwerS (veriFied anSwerS) |already Graded
a+|Brand new verSiOn!!
What are the main ideas of the Dalton (Billiard Ball) model? - anSwer-1. All matter is made up of
tiny indivisible particles called atoms
2. All atoms of the same element are the same in size, mass, etc
3. Atoms of different elements are different in size and mass
4. Atoms of different elements combine in small whole number ratios to form molecules or
compounds
5. In chemical reactions, atoms are not created or destroyed, they are bonded or un-bonded
What are the main ideas of the Thomson (raisin bun) model? - anSwer-1. The atom is a
spherical cloud of positive charge with negatively charged electrons embedded in it
2. The amount of positive charge must equal the amount of negative charge so the atom is neutral
What are the main ideas of the Rutherford model? - anSwer-1. Discovered using the gold foil
experiment
2. The atom is mostly empty space
3. Most of the mass is concentrated in a small, dense nucleus
4. Electrons move around the nucleus like planets around the sun
5. Problem with this model is that the e revolving around should emit radiation and lose NRG,
slow down and spiral down and ultimately fall into the nucleus. This is UNTRUE
What are the main ideas of the Bohr (energy level) model? - anSwer-1. electrons must travel
around the nucleus in specific energy levels
2. If an atom is excited, electrons absorb a certain amount of energy and are boosted to a higher
energy level
3. electrons later drop back down to a lower state releasing energy of a colour equal to the
amount of energy released
4. the number of e in each energy level, n, is equal to 2n^2
