Chapter 2 The Chemical Level of Organization Flashcards
1
Q
What forms the nucleus of an atom?
A
Protons & Neutrons
2
Q
Are large, positively charged particles.
A
Protons
3
Q
The number of protons in the nucleus.
A
Atomic Number
4
Q
Surrounds the nucleus
A
Electrons
5
Q
Is the sum of protons and neutrons in an atom. Show how much an atom weighs. This is a whole number.
A
Mass Number
6
Q
Is the average mass of all isotopes. Since this is an average, it is not a whole number.
A
Atomic Mass
7
Q
Is the most important and abundant inorganic compound in all living systems.
A
Water
8
Q
Important elements in the human body.
A
Hydrogen
Carbon
Oxygen
Nitrogen
Sodium
Sulfur
Sodium Iodine
9
Q
What are the three matters ?
A
Solid- bones, muscle, teeth
Liquid- blood & plasma
Gas- Oxygen & Carbon Dioxide
