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Honors Bio test 1
Terms in this set (65)
Can an element be broken down into simpler substances?
how many natural occurring elements are on Earth? How many are essential to life?
What four elements make up more than 96% of the mass of a human?
Carbon, Hydrogen, oxygen, and Nitrogen
What is each element abbreviated by?
One- or two- letter symbol
What is presented in very small amounts?
What is the maximum number of electron is each energy level, one two and three?
2, 8, 18
C or E: H2O, a liquid that no longer resembles either hydrogen or oxygen gas
C or E: A substance that can be broken down in a chemical reaction
C or E: Carbon, the substance represented by the symbol C
C or E: Sodium chloride (NaCL), commonly known as table salt
C or E: Gold, a substance that cannot be broken down further
I or C: An attractive force between two ions of opposite charge
I or C: Found in the compound NaCL
I or C: Increases the stability of atoms
I or C: Results in the formation of a molecule
I or C: Is formed when atoms share electrons
I or C: Found in most compounds that make up living organisms
What is a solution?
A mixture in which one or more substances are distributed evenly into another substance
What is an example of a solution?
Describe a concentrated solution
The amount of solute that is dissolved in a solvent is the concentration
T or F: A water molecule has two covalent bonds
T or F: In a water molecule, electrons are shared equally between the hydrogen atoms and oxygen atom
T or F: The attraction of opposite charges between hydrogen and oxygen forms a weak oxygen bond
Why must equations always be balanced?
The Law Of Conservation of Matter. This scientific law states that matter cannot be created out of nothing nor can it be destroyed
What two products are formed in
C6H12O6 + 6O2 = 6CO2 + 6H2O
Water and Carbon Dioxide
What two substances are the reactants?
C6H12O6 + 6O2 = 6CO2 + 6H2O
Oxygen and glucose
Which number indicates the number of molecules of a substance?
Which number indicates the number of atoms of each element in a substance?
What is an acid?
Any substance that forms hydrogen ions (H+) in water
What is a base?
Any substance that forms hydroxide ions (OH-) in water
More electrons mean what?
More protons mean what?
What makes an element what it is?
The number of Protons
What can you change in an element?
The number of nuetrons
What don't ionic substances make up?
What are ionic substances essential for?
The function of organisms
What don't ionic bonds formulate?
What would happen if we were made of ionic bonds?
we would dissolve in water
Ionic cells are....?
soluble in water and are easily transported through cell membranes
What is an ionic substance a combination of?
A metal and nonmetal
What happens to the metal? nonmetal?
the metal losses and becomes more positive; The nonmetal gains and becomes more negative
What does a covalent bond form?
The molecules of life
Is a covalent bond stronger than an Ionic bond?
What is a covalent bond?
Two elements sharing electrons (no losers, no winners)
What do covalent bonds occur between?
Is a covalent bond soluble in water?
What Is organic chemistry also known as?
the main organic substance; most versatile, lightest, and strongest
What type of life form are we based off of?
Carbon based life form
If you don't have all of the complex mechanisms in place in a cell thens it's not going to survive
Variation of a structure of a molecule
Why is carbon a superior building block?
It's in row 4a
What are the four properties of water?
1. Universal solvent
2. High heat capacity
3. High boiling and freezing point
4. High surface tension and wetting ability
What are all four of water's properties a result from?
Attraction between molecules
What does a water molecule consist of?
Hydrogen and oxygen
dots (max. electrons)
Water sticking to objects
Water sticking to itself
What happens to water when it hits 32 degrees?
It freezes and its volume increases by 10%
What does PH stand for?
What happens when you have more hydroxide than hydronium?
a base is formed
What happens when you have more hydronium than hydroxide?
an acid is formed
What is an isotope?
Atoms of the same element that have different numbers of nuetrons
What is one way that an atom can become stable?
sharing electrons with other atoms
Recommended textbook explanations
Matta, Staley, Waterman, Wilbraham
Chemistry Matter and Change
Buthelezi, Dingrando, Hainen, Wistrom
Holt McDougal Modern Chemistry
Sarquis, J., Sarquis, M.
Donald J. DeCoste, Steven S. Zumdahl
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