Chapter 2 - Chemistry Pt 2 Flashcards
What are the three different types of bonds?
Hydrogen bonds, ionic bonds, and covalent bonds
What two types of covalent bonds are there?
Nonpolar and polar covalent bonds
What are Nonpolar Covalent Bonds?
Equal sharing of electrons
What are Polar Covalent Bonds?
Unequal sharing of electrons
What is the strongest type of chemical bonds?
Double Covalent Bond
What aspect of a molecule allows the body to recognize it?
The shape of the molecule
What determines the “pull” or “dominance” of an atom in covalent chemical bonds?
Electronegativity (strength)
Molecules that contain only one element have what kind of electronegativity in covalent bonding?
Equal electronegativity
What bonds are formed when electronegativity is equal between bonding molecules?
Nonpolar covalent bonds
An atom or molecule with an electrical charge resulting from gain or loss of electrons is called:
An ion
What charge results in an ion when an electron is lost?
A positive charge
What charge results in an ion when an electron is gained?
A negative charge
What types of ions attract eachother?
Oppositely charged ions
When the attraction of ions hold together, it is called an
Ionic bond
What type of bond holds DNA together?
Hydrogen bonds
Life supporting properties of water include:
Cohesion, adhesion, temperature stability, and strong solvent properties (facilitates chemical reactions)
The process in which water molecules cling together because of hydrogen bonding is called:
Cohesion
Water’s positive and negative poles allowing it to stick to polar surfaces is called:
Adhesion (Ad, Youtube, Adhesion, Tube)
Surface tension is related to:
Cohesion. Hydrogen bonds give water high surface tension
What part of water allows it to have a greater ability to resist temperature change?
Its hydrogen bonds
What is released when hydrogen bonds form?
Heat
What part of evaporation allows remaining liquid to cool down?
Evaporative cooling
In what forms can water exist?
Gas, liquid, or solid.
What is a solution called when the solvent is water?
An aqueous solution
The dissolving agent is called
a solvent
The substance being dissolved is called
a solute
