Chapter 2: The Chemical Context Of Life Flashcards
0
Q
The Earth’s substances
A
CHNOPS
1
Q
Compound
A
A substance consisting of two or more elements
2
Q
Trace elements
A
Those required by organisms in only minute quantities
3
Q
Atom
A
The smallest unit of an ELEMENT
4
Q
Isotopes
A
forms of an element with different numbers of NEUTRONS
5
Q
Atomic number
A
Number of PROTONS
6
Q
Mass number
A
Protons + neutrons
7
Q
Ionic bonds
A
Ions attracted to each other because of their opposite charges
