chapter 2 quiz

• What is not a subatomic particle?

  Molecule
• Where are protons and neutrons located?

  Nucleus
• What are electrons responsible for?

  Chemical bonding
• What is equal to the atomic number of an element?

  Protons
• What is the mass number of an atom with 8 protons and 10 neutrons?

  18
• What does an ion gain or lose?

  Electrons
• What type of bond forms when atoms share electrons?

  Covalent bond
• What are water molecules held together by?

  Hydrogen bonds
• What is not one of the 6 elements we are composed of?

  Calcium
• What do isotopes have a varying number of?

  neutrons
• What are atoms whose valence shells are full considered?


  Stable
• When atoms form an ionic bond, what occurs?


  One atom completely transfers electrons to the other
• What measures an atoms ability to attract electrons?

  Electronegativity
• What level in the hierarchy of life is a monkey?

  Organism
• What does the reactivity of an atom depend on?

  The number of valence electrons
• What has negligible mass?

  Electrons
• What is a substance with a pH of 3 considered?

  acidic
• What is the smallest piece of an element that retains the characteristics of the element?

  Atom
• What measures the atom's ability to attract electrons?

  Electronegativity
• What food is not acidic?

  Milk
• What is the primary function of the acid mantle of human skin?

  Protection from pathogens
• What is an atom that has gained electrical charge?

  Anion
• What occurs when electrons are shared between two atoms to complete their valence shells?

  Covalent bond
• What type of bond would form from the transfer of an electron from one atom to another?

  Ionic bond
• What is an atom that has gained electrons?

  Anion
• What needs to be added to get a pH solution of 8 to have a pH of 3?

  Acid
• What bond is created when two hydrogen atoms are bonded to a single oxygen atom?

  Hydrogen Bond
• What is this attraction called: The slight negative charge at one end of one water molecule is attracted to the slight positive charge or another water molecule

  Hydrophillic bond
• What is the pH scale a mathematical indicator of?

  concentration of H+ present in a solution
• What does hydrolysis of a disaccharide result in?

  two monosaccharides
• What is the name of the chemical reaction used to combine monomers?

  Dehydration synthesis
• What is not considered a property of water?

  Neutral pH
• What is the tendency of like water molecules sticking together?

  Cohesion
• What do the lower numbers on the pH scale indicate?

  High H+, and low OH
• What is the tendency of different molecules to attract each other?

  adhesion
• What can donate H+ ions as needed?

  Acids
• What is the range of the pH scale?

  0-14