CHEM 120 Week 3 Exam 1 (Units 1 and 2)

Answer the following questions (1 point each) to add up to 5 points back to your exam score.

Question: Choose any isotope of an element and answer the following
1. Write the isotopic formula
2. How many neutrons in the isotope?
3. How many protons are in the isotope?
4. How many electrons are in the isotope?
5. What is the mass number for the isotope?
Question: Choose any molecular compound with 3 to 5 atoms in it.
1. Draw the Lewis
2. Give step by step directions for how to draw the Lewis
3. Give the molecular shape
4. Give an explanation for how you determined the shape
5. Isyourmoleculepolarornonpolar
Question: Explain what hydrogen bonding is.
1. Give an example of a molecule that would hydrogen bond
2. Explain how hydrogen bonding affects physical properties like boiling

Question: Explain the difference between ionic and molecular (covalent) bonding. Make sure you include what happens with the electrons.
1. Give an example of an ionic compound, give the correct formula and correct Explain how you determined the name of the compound from the formula
2. Give an example of a molecular compound, give the correct formula and correct Explain how your determined the name from the formula.
Question: Explain what a negative control is in an experiment.
1. Give an example of an experiment and the negative control
2. Identify the independent and dependent variables

You re conducting a study on the effects of carrot consumption on blood pressure. you will be giving carrots to participants in your study and monitoring their blood pressure over several months
You have an isotope that has a mass number of 195 and contains 116 neutrons what isotope is this
Determine which ion has the ground state electron configuration of 1s2,
Which of the following substances contain ionic bonds?
What is the name of the compound N
Which of the following species would you expect form intermolecular hydrogen bonds?
In an experiment you calculate that 50 gram of liquid has a volume of 2.50 ml…..
What is the mass of a 160 lb person using appropriate units?
You have purchased 5 gallons of a chemical to peer review an experimental procedure
Match the following compounds with their molecular shapes
In a molecule that contains a polar covalent bond, electrons in this bond are
The bond between two nitrogen atoms would be described as an:
An ion has 4 neutrons 3 protons and 2 electrons what is the charge of the ion
What is the mass number of a silicon isotope with 15 neutrons?