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
Hydrophillicbond
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?