Identify Molecules
Is a single carbon atom or a single helium atom considered a molecule?
No, single atoms like a single carbon atom or a single helium atom are not molecules.
Why is it necessary for scientists to use models when studying atoms and molecules?
Molecules and atoms are too small to actually see, so using models helps us study them on a larger scale.
Even though they look very different, diamonds and the graphite used in pencil lead are both made entirely of atoms from which single element?
Diamonds and graphite are both made of atoms of a single element: carbon
According to their physical properties, what state of matter are hydrogen and helium at room temperature?
Both hydrogen and helium are gases at room temperature.
Whats Ms.Hankins favorite color
green
If you have two hydrogen atoms bonded together, or two carbon atoms bonded together, are these considered molecules?
Yes, two hydrogen atoms bonded together and two carbon atoms bonded together are both examples of molecules.
In a molecular model, how is a molecule of hydrogen gas typically represented?
A molecule of hydrogen gas is represented by two hydrogen atoms bonded together.
By looking at a structural model, how can you explain why graphite is soft and slippery while diamond is very hard?
The graphite model shows weak connections between its atomic layers using dotted lines, while the diamond model only shows solid lines representing stronger attractions.
If you exposed a balloon filled with hydrogen gas and a balloon filled with helium to a flame (oxygen), how would their reactions differ?
Hydrogen gas reacts violently with oxygen, whereas helium has no observable reaction.
How many kids does Ms.Hankins Have?
0 kids
What atoms make up a single molecule of water?
A molecule of water consists of an oxygen atom bonded to two hydrogen atoms.
Explain the difference in scale between a model of a single water molecule and a model of a water balloon
A single molecule of water contains only three atoms, whereas a water balloon contains thousands of atoms.
What is the difference in density between diamond and graphite?
Diamond has a density of 3510 kg/m^3, while graphite has a lower density of 2250 kg/m^3.
If a molecular model of a balloon shows it is filled with paired hydrogen atoms, what three properties can you expect this substance to have at room temperature?
The substance will be a gas, it will be colorless, and it will react violently with oxygen.
How many siblings does Ms.Hankins have?
5 siblings
Based on their chemical formulas, which of the substances—water (H2O), hydrogen gas (H2), or helium (He)—does NOT exist as a molecule?
Helium (He), because it exists as a single atom rather than multiple atoms bonded together.
Based on molecular models, how many total atoms are represented in one molecule of water compared to one molecule of hydrogen gas?
A water molecule has three atoms (one oxygen, two hydrogen), while a hydrogen gas molecule has two atoms (two hydrogen).
Based on their physical properties, which carbon structure would you use to conduct electricity, and which would you use for a drill bit
Graphite is used for electricity because it has good electrical conductivity, and diamond is used for drilling because it is very hard.
Between hydrogen gas and helium, which substance is less dense?
Hydrogen gas is less dense at .00008 g/mL compared to helium at .0002 g/mL.
How many years have Ms.Hankins been teaching?
6 years
If a substance consists of a single carbon atom bonded to two oxygen atoms, is it classified as a molecule?
Yes, it is a molecule because it consists of multiple atoms bonded together.
Why is it incorrect to state that a pure diamond molecule model is made of two substances, like carbon and oxygen?
Because a pure diamond is made of only one type of atom: carbon.
If a diamond contains a nitrogen impurity, how does its atomic structure compare to a pure diamond, and what does this mean for its properties?
A pure diamond is made of only one type of atom (carbon), but a diamond with an impurity is not, which means the two substances may have different properties
If you are observing a colorless gas that does not react with oxygen, which substance from the table must it be, and what is its chemical formula?
It must be helium, and its chemical formula is He.
What did Ms.Hankins enjoy doing at your age