Question

practice: classification of matter
part 1 classify the following as a substance (s) or a mixture (m).
__1 table salt (nacl) 2 trail mix __3 sugar
__4 copper 5 cereal __6 concrete
part 2 classify the following substances as elements (e) or compounds (c).
__7 mercury 8 water __9 carbon dioxide
__10 iron 11 aluminum __12 oxygen (o₂)
part 3 classify the following mixtures as homogenous (ho) or heterogeneous (he).
__13 sand 14 pizza __15 paint
__16 saltwater 17 bronze __18 air
part 4 classify the following as an element (e), compound (c), homogeneous mixture (ho) or heterogeneous mixture (he).
__19 calcium 20 hydrogen (h₂) __21 orange juice with pulp
__22 baking soda (nahco₃) 23 helium __24 limestone (caco₃)
part 5 each of the following circles represents an atom. if two atoms are touching than they are bonded together. knowing this, classify each picture as one of the following:
a = element
b = compound
c = mixture of elements
d = mixture of compounds
e = mixture of elements and compounds

1. ________ 26. ______ 27. ________
2. ________ 29. ______ 30. ________

Explanation:

Step1: Classify as Substance/Mixture

1. Table salt (NaCl): S (pure compound, substance)
2. Trail mix: M (multiple distinct components)
3. Sugar: S (pure compound, substance)
4. Copper: S (pure element, substance)
5. Cereal: M (multiple distinct components)
6. Concrete: M (multiple distinct components)

Step2: Classify as Element/Compound

1. Mercury: E (single type of atom)
2. Water: C (H₂O, two elements bonded)
3. Carbon dioxide: C (CO₂, two elements bonded)
4. Iron: E (single type of atom)
5. Aluminum: E (single type of atom)
6. Oxygen (O₂): E (single type of atom, diatomic)

Step3: Classify Mixture Type

1. Sand: HE (varied particle compositions, non-uniform)
2. Pizza: HE (distinct toppings, non-uniform)
3. Paint: HO (uniform composition when mixed)
4. Saltwater: HO (uniform dissolved salt distribution)
5. Bronze: HO (uniform alloy mixture)
6. Air: HO (uniform gas mixture)

Step4: Full Matter Classification

1. Calcium: E (single type of atom)
2. Hydrogen (H₂): E (single type of atom, diatomic)
3. Orange juice with pulp: HE (pulp is distinct, non-uniform)
4. Baking soda (NaHCO₃): C (multiple elements bonded)
5. Helium: E (single type of atom, noble gas)
6. Limestone (CaCO₃): C (multiple elements bonded)

Step5: Classify Particle Diagrams

1. E (mixture of diatomic element molecules and compound molecules)
2. B (all identical compound molecules)
3. A (single type of individual atoms)
4. A (all identical diatomic element molecules)
5. D (mixture of two different compound molecules)
6. E (mixture of compound molecules and single element atoms)

Answer:

Part 1

1. S
2. M
3. S
4. S
5. M
6. M

Part 2

1. E
2. C
3. C
4. E
5. E
6. E

Part 3

1. HE
2. HE
3. HO
4. HO
5. HO
6. HO

Part 4

1. E
2. E
3. HE
4. C
5. E
6. C

Part 5

1. E
2. B
3. A
4. A
5. D
6. E