Unit 2 Post-Assessment Bio

1. What is at the center of an atom and contains protons and neutrons?

• a. cell
• b. electron
• c. isotope
• d. nucleus

2. What is a charged atom or molecule?

• a. covalent
• b. compound
• c. ion
• d. molecule

3. What is two or more different chemical elements chemically joined called?

• a. ion
• b. element
• c. compound
• d. mixture

4. What is a negative subatomic particle that moves around the nucleus of an atom?

• a. proton
• b. neutron
• c. electron
• d. ion

5. Using the image below, which letters correspond correctly with the parts of the atom?

• a. A (nucleus), B (proton), C (neutron), D (electron)
• B. A (electron), B (proton), C (neutron), D (nucleus)
• C. A (electron), B (neutron), C (proton), D (nucleus)
• D. A (proton), B (neutron), C (electron), D (nucleus)

6. Which type of bond is formed when one or more electrons are transferred from one atom to another?

• ionic bond
• covalent bond
• organic bond
• inorganic bond

7. What is anything that has mass and takes up space?

• a. energy
• b. compound
• c. matter
• d. molecule

8. What is a mixture that has components evenly distributed throughout?

• a. solution
• b. hemizygous
• c. suspension
• d. elemental

9. The following is NOT a characteristic of water.

• a. Has a partial negative charge on one end and a positive charge on the other
• b. is a nonpolar molecule
• c. often found as a part of a mixture
• d. able to form multiple hydrogen bonds

10. What is a solution with a pH of 2?

• a. acid
• b. base
• c. neutral
• d. saturated