Exam 2: Basic Chemistry

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.

What relationship can be determined from the following information: • The radioactive isotope iodine 131 has a half-life of 8.1 days and emits 0.8 MeV (milli-electronvolts)of energy. • The radioactive isotope phosphorus 32 has a half-life of 14.3 days and emits 1.7 MeV of energy. • The radioactive isotope phosphorus 33 has a half-life of 25.5 days and emits 0.25 MeV of energy. • The radioactive isotope sulfur 35 has a half-life of 87.5 days and emits 0.2 MeV of energy.

Which of the following elements would be the most reactive with other elements?

The blood buffer reactions described by H₂CO₃ <--------> H⁺ + HCO₃- indicate that

If an element contains eight electrons how many electrons will be placed in the second valence shell?

Which of the following statements is/are true about the pH scale? -The scale ranges from 1 to 15.

All of the following are examples of damage caused by acid deposition from rain EXCEPT

An atom's atomic mass is best described as the mass of

In a water molecule,

As a solid,water floats.This means that

What does this graph reveal about the heat of vaporization and the heat of fusion?

Your roommate has heartburn and you hand her a bottle of antacids.She wants you to explain how the antacids will make her feel better.What do you tell her?

Which type of covalent bond is the strongest?

Which of the following statements is/are true about the pH scale? -A change of one pH unit represents a ten-fold increase or decrease in hydroxide ion concentration.