Atomic Structure
What are the charge of electrons?
Negative
What does the Law of Conservation of Mass state?
Atoms cannot be created or destroyed, only transformed/changed.
2H2O --> O2 + H2
What type of reaction?
Decomposition
If a chemical reaction releases heat, how would we describe it?
Exothermic
What subject does Mrs. Jones also teach at Smoky?
Math.
If an element has 10 protons, how many electrons should it have?
2H2O --> O2 + 2H2
Balanced or unbalanced?
Balanced
Zn + S --> ZnS
What type of reaction is this?
Synthesis
When mixing baking soda and vinegar together, the container feels cold to the touch. Why?
It is an endothermic reaction.
How many dogs does Mr. Rauluk and Mrs. Jones have, in total?
4 - Mr. Rauluk has 2, Mrs. Jones has 2.
If an element has the atomic mass of 50 and has 25 protons, how many neutrons does it have?
25 neutrons
Fe + O2 --> FeO
Balanced or unbalanced? How do you know?
Unbalanced. Two oxygen in reactants, one in products.
Zn + CuSO4 --> ZnSO4 + Cu
What type of reaction is this?
Single Displacement
What happens to an endothermic reaction if its supply of heat is removed?
The reaction stops.
What city did Mr. Rauluk grow up in?
Pittsburgh
NaOH + HCl --> H2O + NaCl
Balanced or Unbalanced? How do you know?
Balanced.
Atoms: 1 Na on both sides, 1 O on both sides, 1 Cl on both sides, and 2 H on both sides.
Mg + 2HCl --> MgCl2 + H2
What type of reaction is this and how do you know?
Single displacement because Mg replaces the H in HCl.
Examine the temperature data below:
Start: 20OC
15 seconds: 25OC
30 seconds: 30OC
What type of reaction is this? How do you know?
Exothermic reaction because the temperature is increasing.
What state is Mrs. Jones from?
Maine
Correctly draw the atomic structure of Carbon, including electron shells, given this information: 6 protons, 6 neutrons, and 6 electrons.
6 protons and 6 neutrons should be in the nucleus; the first shell should have 2 electrons, the second shell should have 4.
2C3H8 + 5O2 --> 3CO2 + 4H2O
Balanced or unbalanced?
Unbalanced.
6 Carbon, 16 Hydrogen, and 10 Oxygen in reactants, but 3 Carbon, 10 Oxygen, and 8 Hydrogen in products.
C3H8 + 5O2 --> 3CO2 + 4H2O + heat
What type of reaction is this? How do you know?
Oxygen is present + heat is released.
In an endothermic reaction, more/less energy is used in the reactants than in the products.
More (the reaction absorbs energy, why it gets colder)
When is Mr. Rauluk's birthday?
March 10th