CH 2 Basic Chemistry & CH3 Flashcards
1
Q
Matter
A
Contains mass & occupies space
2
Q
Energy
A
NOT matter, can do WORK
3
Q
smallest functional units of matter…
A
Atoms
4
Q
*** Protons
A
- Positive
- Found in Nucleus
- Has mass and gives IDENTITY
- p+
5
Q
**** Neutrons
A
- No charge
- found in nucleus and has mass
- n 0
6
Q
*** Electrons
A
- Negative charge
- no mass, found in orbit
- gives REACTIVITY
- n-
7
Q
Atomic Number
A
= to # of protons in atom
8
Q
Atomic Mass
A
Protons + Neutons
9
Q
Atomic Mass Unit (amu)
A
atoms relative mass compared to other atoms (p+ + n0)
10
Q
Dalton
A
= to amu, g/mole = macroscopic
11
Q
Mole
A
1 mole is the same number of atoms for every element
12
Q
Avogadros #
A
6.022x10^23 (No)
13
Q
Isotopes
A
different forms of an element with different # of neutrons
14
Q
**Covalent Bonds
A
- SHARING electrons
- relatively weak bond
- most common in LIVING matter
15
Q
Polar Covalent
A
Unequal sharing of electrons
partial + and partial - end of a molecule
