Intro :)
Chem 1
Chem 2
I really love Chemistry
Water and Stuff
pH/Buffers
100
Name the 3 domains with their respective kingdoms
Bacteria: Eubacteria
Archaea: Archaebacteria
Eukarya: Plantae, Fungi, Animalia and Protista
100
What are the 4 most abundant elements that make up the human body?
O, C, H, N,
100
What is the name of an atom that is charged?
An ion
100
What are the 4 types of chemical bonds?
Covalent bonds, ionic bonds, hydrogen bonds and Van der Waals interactions
100
What is the difference between adhesion and cohesion?
Cohesion is the property of water sticking to another water molecule, while adhesion is the property of water sticking to a different molecule?
100
Explain the pH scale
Answers may vary
200
What is the smallest unit of matter?
An atom
200
The three subatomic particles that comprise an atom are ______, _______, and an _______.
Proton, neutron, electron
200
In any hydrogen atom, which of the subatomic particles will always be the same?
Protons
200
What type of chemical bonding is present in methane (CH4)?
Nonpolar covalent
200
What does it mean to have a high specific heat capacity?
You require a lot of heat to raise the temperature.
200
The pH of human blood needs to be maintained at a range very close to ____.
7.4
300
Name the 7 properties of life
Order, evolutionary adaption, growth and development, regulation, energy processing, response to the environment, and reproduction.
300
The mass of an atom is located in the ______, while most of the volume is located in the _______.
Nucleus
Electron Cloud
300
What is the relationship between protons and electrons in an atom containing a positive charge?
P>E
300
A negatively charged atom is called a _____.
Anion
300
What happens to the density and volume of water when the temperature is >4oC? What happens to the density and volume of water when the temperature is <4oC?
Density gets lower while volume gets higher.
300
Define the following terms:
Solvent, solute and solution
Solvent: the dissolving agent of a solution
Solute: the substance that is dissolved
Solution: a liquid that is a completely homogeneous
mixture of substances
400
What is DNA?
What is a gene?
Genetic material
Units of inheritance (book full of DNA)
400
Find the charge, mass number and atomic mass of this hydrogen ion
-1, 1, 1
400
How many valence electrons does a S atom have?
6
400
The product of ionic bonding is called a _____.
salt
400
Name the 4 emergent properties of water.
Cohesion/Adhesion
High Specific Heat capacity
Expands upon freezing
Dissolves and dissociates
400
What is [H+] of a solution with a pH of 3?
10-3 M
500
Difference between a eukaryotic cell and a prokaryotic cell
eukaryotic cell is bigger and has a nucleus while a prokaryotic cell is smaller and lacks a nucleus
500
Propose a shell diagram for a Mg2+ ion.
500
Indicate how many of each subatomic particle is present in the following ion:
32P-
Protons: 15
Neutrons: 17
Electrons: 16
500
A hydrogen bond only occurs between?
H-F
H-O
H-N
500
What does it mean to be an aqueous solution?
The solvent is water.
500
Acids _____ (attach/release) H+ in a solution, while bases ______ (attach/release) H+ in a solution.
Release
Attach