Question

1. identify each of the drawings below as an element, a compound or a mixture. 5 point each box
2. identify each of the common items below as an element, a compound or a mixture. their chemical formulas have been given to help you out. .25 point each

a. sugar (c₆h₁₂o₆) g. gold (au)
b. phosphorus (p₄) h. granite (sio₂ & kalsi₃o₈ & k₂si₃o₁₀...)
c. battery acid (h₂so₄) i. drain cleaner (al & naoh & ...)
d. air (n₂ & o₂ & ar & co₂... ) j. sodium (na)
e. oxygen (o₂) k. water (h₂o)
f. milk (c₁₂h₂₂o₁₁ & h₂o & c₅₀h₁₀₂o₃... ) l. salt water (nacl & h₂o)

Explanation:

Step1: Recall definitions

An element consists of only one type of atom, a compound consists of two or more different - types of atoms chemically combined, and a mixture contains two or more substances that are not chemically combined.

Step2: Analyze drawings

For the drawings:

• If all the particles are identical, it is an element.
• If the particles are made up of different - types of atoms bonded together, it is a compound.
• If there are different types of particles that are not bonded together, it is a mixture.

Step3: Analyze common items

• Sugar ($C_6H_{12}O_6$) is a compound as it has different types of atoms ($C$, $H$, $O$) chemically combined.
• Phosphorus ($P_4$) is an element as it consists of only phosphorus atoms.
• Battery Acid ($H_2SO_4$) is a compound with $H$, $S$, and $O$ atoms chemically combined.
• Air ($N_2$, $O_2$, $Ar$, $CO_2$...) is a mixture as it has different substances not chemically combined.
• Oxygen ($O_2$) is an element with only oxygen atoms.
• Milk ($C_{12}H_{22}O_{11}$, $H_2O$, $C_{50}H_{10}O_{3}$...) is a mixture with different substances.
• Gold (Au) is an element with only gold atoms.
• Granite ($SiO_2$, $KAlSi_3O_8$, $K_2Si_3O_{10}$...) is a mixture with different minerals.
• Drain cleaner ($Al$, $NaOH$...) is a mixture with different substances.
• Sodium (Na) is an element with only sodium atoms.
• Water ($H_2O$) is a compound with $H$ and $O$ atoms chemically combined.
• Salt - water ($NaCl$, $H_2O$) is a mixture with salt and water not chemically combined.

Answer:

For the drawings: Analyze particle - types as described above.
For the common items:
A. Compound
B. Element
C. Compound
D. Mixture
E. Element
F. Mixture
G. Element
H. Mixture
I. Mixture
J. Element
K. Compound
L. Mixture