Unit Three - Chemistry of life Flashcards
1
Q
The atomic number is equal to the number of what in an atom?
A
PROTONS
2
Q
In an electrically neutral atom the # of protons is equal to the # of…..
A
ELECTRONS
3
Q
Atoms react with one another to form WHAT in their outer shell
A
MOLECULE
4
Q
Ionic bonds are typically found in what kind of compounds?
A
INORGANIC
5
Q
In a covalent reaction…
A
Atoms share electrons
6
Q
Three characteristics beneficial to life from hydrogen bonding in water
A
- Causes water molecules to cling together
- Water absorbs a great deal of heat before it evaporates and gives off this heat as it cools
- Can distribute substances and heat throughout the body
7
Q
Acids are molecules that release…
A
hydrogen ions
8
Q
Enzymes
A
Speed up chemical reactions
9
Q
Macromolecules vs. monomers
A
Nucleic Acid Nucleotide
Lipid Glycerol & fatty acid
Protein Amino acid
Carbohydrate Monosaccharide
10
Q
pH 3 is a base. T/F
A
FALSE
11
Q
OH- is called an hydroxide ion; T/F
A
TRUE
