Definitions
A force of attraction between atoms or a group of atoms due to the sharing or transferring of electrons.
What is Chemical Bond
Remember that subscripts tell how many of each element are in a molecule (there are no subscripts if there is one atom in the molecule). Therefore, a molecule with 1 carbon atom and 4 chlorine atoms would have the chemical formula?
What is CCl₄
What occurs when two nonmetal atoms share valence electrons?
What is a covalent bond
The property of water that is not a result of hydrogen bonding is its?
What is its dissolving salt (another answer could be transparency)
In the Polarity of Water experiment, what happened to the stream of water when the charged balloon was brought near it?
What is it bent toward the balloon
Substances that undergo a chemical change.
What is Reactants.
A molecule of caffeine has the chemical formula of?
What is C₈H₁₀N₄O₂
When 2 atoms have an unequal pull on the electrons they share what?
What is a polar covelant bond.
A water strider insect is able to walk on water- despite being denser than water because water has what?
What is cohesion.
In the Polarity of Water experiment, why did the stream of vegetable oil NOT bend toward the charged balloon?
What is Oil is nonpolar, so it has no positive and negative ends to be attracted to the balloon
An atom or a group of atoms that has a positive or negative charge
What is Ion
AgNO₃ has?
What is 1 silver atom, 1 nitrogen atom, and 3 oxygen atoms.
What bonds are the weakest bonds because they are a result of the attraction of slight changes on atoms due to uneven sharing of electrons within molecules?
What is Hydrogen bonds
In reference to the water strider walking on water and not sinking, the results is a phenomenon called what?
What is surface tension.
In the Forces Between Molecules experiment, more red (hot) water moved through the paper towel than blue (cold) water. Why?
What is warmer water molecules have more kinetic energy, so they should have moved faster
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
What is Polar Molecule
The arrow helps you to determine the direction of the chemical reaction. You start with Zn and 2HCL and you end up with ZNCL2 and H2. So,
In Zn + 2HCl → ZnCl₂ + H₂, which substances are the reactants and which are the products?
What is Zn + 2HCl= Reactants and ZnCl₂ + H₂= Products
Hydrogen bonds are not covalent or ionic bonds but instead are a weaker force of attraction that causes the molecules to what?
What is stick together.
What are the 3 phases of water?
What is solid, liquid and gas
In the Forces Between Molecules experiment, the paperclip would have floated unless this was added to the water, causing it to sink
What is dish soap, because it reduces water’s surface tension
The force of attraction between molecules of the same substance so that they tend to stay together.
What is Cohesion
The most stable electron configuration for atoms is when?
What is their highest energy level has a full set of electrons.
A chemical bond formed between oppositely charged ions is what?
What is ionic bond
Water is able to dissolve many substance because of its what?
What is polarity.
What is adhesion (water is strongly attracted to glass)