Question

chemistry matter review practice

1. classify the following as an element, compound or mixture

a) iron ______________
b) dirt ______________
c) sodium chloride __________
d) silver______________
e) water______________
f) baking soda ______________
g) milk______________
h) uranium______________
i) gold______________
j) neon______________
k) iced tea______________
l) seven - bean soup__________
m) baking soda______________
n) ocean water______________
o) aluminum______________
p) sugar______________
q) air______________

Explanation:

To solve this, we recall the definitions:

• Element: Pure substance with one type of atom (e.g., Fe, Ag, Ne).
• Compound: Pure substance with two+ different atoms (e.g., NaCl, H₂O, NaHCO₃).
• Mixture: Two+ substances physically combined (e.g., dirt, milk, iced tea).

Part (a) - Iron

Iron (Fe) is a single type of atom.
Classification: Element

Part (b) - Dirt

Dirt contains minerals, organic matter, etc. (multiple substances).
Classification: Mixture

Part (c) - Sodium chloride

NaCl has Na⁺ and Cl⁻ ions (two elements, chemically bonded).
Classification: Compound

Part (d) - Silver

Silver (Ag) is a single type of atom.
Classification: Element

Part (e) - Water

H₂O has H and O atoms (two elements, chemically bonded).
Classification: Compound

Part (f) - Baking soda

NaHCO₃ (sodium bicarbonate) has Na, H, C, O (multiple elements, bonded).
Classification: Compound

Part (g) - Milk

Milk has water, fats, proteins, etc. (multiple substances).
Classification: Mixture

Part (h) - Uranium

Uranium (U) is a single type of atom.
Classification: Element

Part (i) - Gold

Gold (Au) is a single type of atom.
Classification: Element

Part (j) - Neon

Neon (Ne) is a single type of atom (noble gas).
Classification: Element

Part (k) - Iced tea

Iced tea has water, tea, sugar, etc. (multiple substances).
Classification: Mixture

Part (l) - Seven - bean soup

Contains beans, water, spices, etc. (multiple substances).
Classification: Mixture

Part (m) - Baking soda

Same as part (f): NaHCO₃ (compound).
Classification: Compound

Part (n) - Ocean water

Has water, salt, plankton, etc. (multiple substances).
Classification: Mixture

Part (o) - Aluminum

Aluminum (Al) is a single type of atom.
Classification: Element

Part (p) - Sugar

Sugar (e.g., C₁₂H₂₂O₁₁) has C, H, O (multiple elements, bonded).
Classification: Compound

Part (q) - Air

Air has N₂, O₂, CO₂, etc. (multiple substances).
Classification: Mixture

Final Answers:

a) Element
b) Mixture
c) Compound
d) Element
e) Compound
f) Compound
g) Mixture
h) Element
i) Element
j) Element
k) Mixture
l) Mixture
m) Compound
n) Mixture
o) Element
p) Compound
q) Mixture

Answer:

To solve this, we recall the definitions:

• Element: Pure substance with one type of atom (e.g., Fe, Ag, Ne).
• Compound: Pure substance with two+ different atoms (e.g., NaCl, H₂O, NaHCO₃).
• Mixture: Two+ substances physically combined (e.g., dirt, milk, iced tea).

Part (a) - Iron

Iron (Fe) is a single type of atom.
Classification: Element

Part (b) - Dirt

Dirt contains minerals, organic matter, etc. (multiple substances).
Classification: Mixture

Part (c) - Sodium chloride

NaCl has Na⁺ and Cl⁻ ions (two elements, chemically bonded).
Classification: Compound

Part (d) - Silver

Silver (Ag) is a single type of atom.
Classification: Element

Part (e) - Water

H₂O has H and O atoms (two elements, chemically bonded).
Classification: Compound

Part (f) - Baking soda

NaHCO₃ (sodium bicarbonate) has Na, H, C, O (multiple elements, bonded).
Classification: Compound

Part (g) - Milk

Milk has water, fats, proteins, etc. (multiple substances).
Classification: Mixture

Part (h) - Uranium

Uranium (U) is a single type of atom.
Classification: Element

Part (i) - Gold

Gold (Au) is a single type of atom.
Classification: Element

Part (j) - Neon

Neon (Ne) is a single type of atom (noble gas).
Classification: Element

Part (k) - Iced tea

Iced tea has water, tea, sugar, etc. (multiple substances).
Classification: Mixture

Part (l) - Seven - bean soup

Contains beans, water, spices, etc. (multiple substances).
Classification: Mixture

Part (m) - Baking soda

Same as part (f): NaHCO₃ (compound).
Classification: Compound

Part (n) - Ocean water

Has water, salt, plankton, etc. (multiple substances).
Classification: Mixture

Part (o) - Aluminum

Aluminum (Al) is a single type of atom.
Classification: Element

Part (p) - Sugar

Sugar (e.g., C₁₂H₂₂O₁₁) has C, H, O (multiple elements, bonded).
Classification: Compound

Part (q) - Air

Air has N₂, O₂, CO₂, etc. (multiple substances).
Classification: Mixture

Final Answers:

a) Element
b) Mixture
c) Compound
d) Element
e) Compound
f) Compound
g) Mixture
h) Element
i) Element
j) Element
k) Mixture
l) Mixture
m) Compound
n) Mixture
o) Element
p) Compound
q) Mixture