3d molecular design questions

What will happen when two water molecules bump into each other?

- When the oxygen atoms of 2 different water molecules come together, they repel. - When the hydrogen atoms of 2 different water molecules come together, they repel. - When an oxygen atom and a hydrogen atom from two different water molecules come together, they attract.

What are the similarities and differences between magnets and water molecules?

Atoms are not really magnetic. However, the north and south poles of magnets can be used to effectively model the partial positive and partial negative charges that exist on the polar water molecule.

Are chloride ions positively or negatively charged? Why?

Chloride ions interact with hydrogen atoms in water molecules. Since hydrogen atoms are partially positively charged, the chloride ions are negatively charged.

At the scale of the water molecule models, how large would a water drop be?

Clarify that it is impossible to see a single water molecule with the naked eye or even with the most powerful microscope. A water drop made of 3 x 1021 of 3D water molecule models would be larger than the earth.

What is the intra-molecular bond that holds the hydrogen and carbon atoms within an ethane molecule?

Covalent bonds.

What is ethane?

Ethane is a short hydrocarbon. Hydrocarbons are combinations of carbon and hydrogen atoms. Ethane is an odorless, colorless gas that can be used as afuel, a freezing agent, and in making other chemicals

Is an ethane molecule a polar covalent molecule, or a nonpolar covalent molecule? Why?

Ethane molecules are nonpolar covalent molecules because electrons are equally shared within the molecule. This equally charged molecule is nonpolar

What is the chemical formula of water?

H2O

Will ethane form a hydrogen bond with water? Why or why not?

No, ethane will not form a hydrogen bond, or ionic bond with water or any other polar molecule because it is nonpolar. Ethane does not have any partial positive or negative charges.

Do hydrogen atoms and chloride ions form hydrogen bonds? Why?

No, the intermolecular force between the hydrogen atom and chloride ion is not a hydrogen bond because hydrogen bonds are only formed between hydrogen and fluorine, nitrogen and oxygen atoms

Will two ethane molecules form bonds with each other? Why or why not?

No. Ethane molecules will not form covalent, ionic or hydrogen bonds with each other. Ethane molecules have small intermolecular forces and will interact under the certain temperature and pressure conditions to form liquids and solids.

What is sodium chloride?

Sodium chloride is an ionic compound often called table salt or rock salt

Will sodium chloride interact with ethane? With ethanol? Why or why not?

Sodium chloride will not interact with ethane because ethane is nonpolar. Sodium chloride will interact with the ethanol

Are sodium ions positively or negatively charged? Why?

Sodium ions interact with oxygen atoms in water molecules. Since oxygen atoms are partially negatively charged, the sodium ions are positively charged.

What do the colors represent? What is the chemical formula of sodium chloride?

The blue atom represents sodium, the green chlorine. NaCl.

Will ethanol and water interact? How?

The water molecules will form hydrogen bonds with the oxygen atom and the single polar hydrogen atom on the ethanol.

How many water molecules are in a single drop of water?

There are 3 x 10^21 of molecules in one drop of water (3,000,000,000,000,000,000,000). This number can be read, "three times ten to the twenty first power."

Is a water molecule a polar covalent molecule, or a nonpolar covalent molecule? Why?

Water molecules are polar covalent molecules because electrons are shared within the molecule and the sharing of the electrons is unequal which results in partially positively charged hydrogen atoms and a partially negatively charged oxygen atom.

What does the 2 between the hydrogen and oxygen stand for?

When a number # is placed after a symbol, it means there is more than one atom of that element and when there is no number after a symbol, it means there is only one atom of that element.

What do the different colors represent in the lab? What is the chemical formula of ethanol?

White represents hydrogen atoms, the gray represents carbon atoms, and the red represents oxygen atoms. CH CH OH

Will a water molecule interact with sodium chloride? Why?

Yes, water molecules and sodium chloride ions will interact. The partially charged water molecule will interact with the fully charged sodium chloride. These are intermolecular forces.

Will ethanol molecules interact with each other? Why?

Yes. Ethanol will form hydrogen bonds with other ethanol molecules.

What is the intramolecular bond that holds the hydrogen atoms and oxygen atom within a water molecule?

covalent bond

What is the intermolecular force that holds these two water molecules together?

hydrogen bond

The intramolecular bond that holds these ions together is ionic. What does this mean?

ionic bonds are formed when an electron is completely transferred from one atom to another. This results in a positively charged ion (the atom that looses an electron) and a negatively charged ion (the atom that gains an electron).

What do the different colors on the ethane molecule represent? What is the chemical formula of ethane?

white represents hydrogen atoms and the gray represents carbon. CH CH