Question

particle diagrams - showing solid, liquid, gases of the same substance
part 1: determining chemical formula based on particle diagram
directions: for each of the following particle diagrams determine the chemical formula and determine if the substance is a mixture, element or compound.
chemical formula:
mixture / element / compound
chemical formula:
mixture / element / compound
chemical formula:
mixture / element / compound
chemical formula:
mixture / element / compound
chemical formula:
mixture / element / compound
chemical formula:
mixture / element / compound
part 2: drawing particle diagram based on chemical formula
directions: for each of the following questions use the chemical formula to draw the corresponding particle diagram and determine if the substance is a mixture, element or compound.
chemical formula: cf₄
mixture / element / compound
chemical formula: he & n₂
mixture / element / compound
chemical formula: hno₃
mixture / element / compound

Explanation:

Step1: Analyze first diagram

Each molecule has 2 oxygen atoms, formula is $O_2$. It has only one - type of element - oxygen, so it is an element.

Step2: Analyze second diagram

Each molecule has 1 aluminum and 3 fluorine atoms, formula is $AlF_3$. It has two different elements combined, so it is a compound.

Step3: Analyze third diagram

There are separate sodium - chloride ($NaCl$) units and gold ($Au$) atoms. Since there are two different substances, it is a mixture. The chemical formulas are $NaCl$ and $Au$.

Step4: Analyze fourth diagram

Each molecule has 1 sulfur and 3 oxygen atoms, formula is $SO_3$. It has two different elements combined, so it is a compound.

Step5: Analyze fifth diagram

There are separate hydrogen ($H_2$) and helium ($He$) units. Since there are two different substances, it is a mixture. The chemical formulas are $H_2$ and $He$.

Step6: Analyze sixth diagram

There are carbon - monoxide ($CO$), water ($H_2O$) units. Since there are two different substances, it is a mixture. The chemical formulas are $CO$ and $H_2O$.

Step7: Analyze $CF_4$

$CF_4$ has one carbon and four fluorine atoms in each molecule. It has two different elements combined, so it is a compound.

Step8: Analyze $He\&N_2$

There are separate helium ($He$) and nitrogen ($N_2$) units. Since there are two different substances, it is a mixture.

Step9: Analyze $HNO_3$

$HNO_3$ has one hydrogen, one nitrogen and three oxygen atoms in each molecule. It has three different elements combined, so it is a compound.

Answer:

1. Chemical Formula: $O_2$, Element
2. Chemical Formula: $AlF_3$, Compound
3. Chemical Formula: $NaCl, Au$, Mixture
4. Chemical Formula: $SO_3$, Compound
5. Chemical Formula: $H_2, He$, Mixture
6. Chemical Formula: $CO, H_2O$, Mixture
7. Chemical Formula: $CF_4$, Compound
8. Chemical Formula: $He, N_2$, Mixture
9. Chemical Formula: $HNO_3$, Compound