Exam Review Session 1- Life 102

• Carbon-12 is an example of which of the following?

• Atomic mass

  
  

• Ion

• Isotope

• Electronegativity

Which is ALWAYS true of carbon if it has 6 protons?

• It’s atomic number is 6

• It has 6 neutrons

• It’s molecular weight is 12

• All of the above

What bond is formed when an atom Transfers one or more electrons?

• 1. Covalent Bond

• Ionic Bond

• Polar Covalent Bond

• Valence Shell Bond

What is the type of bond that forms when two atoms share electrons?

• Valence Shell Bond

• Ionic Bond

• Covalent Bond

• Hydrogen Bonds

Which of the following is FALSE about Hydrogen Bonds?

• They are Weak Bonds

• They form between water molecules

• They are Strong Bonds

• They cause water to have a high specific heat

Which of the following statements is true about water?

• There are hydrogen bonds between water molecules and polar covalent bonds within water molecules

• There are covalent bonds between water molecules and ionic bonds within water molecules

• • There are polar covalent bonds between water molecules and hydrogen bonds within water molecules

• • There are hydrogen bonds between water molecules and hydrogen bonds within water molecules

What is the relationship between water and hydrophobic substances?

• Hydrophobic substances have a high affinity for water

• Hydrophobic substances seek out (go to) water

• • Hydrophobic substances are polar

• Hydrophobic substances have a low affinity for water

• Which element is the backbone of organic molecules?

• • Calcium

• • Carbon

• Oxygen

• Nitrogen

What are the essential elements of life?

• Hydrogen, oxygen, nitrogen, and carbon

• Hydrogen, oxygen, chlorine, and carbon

• earth, wind, and fire

• magnesium, chlorine, iron, phosphorous

Carbon can form four bonds, which allows it to be the building block of life. This is because...

• It has four electrons

• It's atomic number is four

• it has four protons

• It has four valence electrons