Atomic Theories & Models
Atomic Structure
Atomic Number & Mass
Isotopes
Random
Random +100
100
How many electron energy levels are there?
4 levels (1, 2, 3, 4)
100
Basic unit of matter and the smallest particle of an element is _______________
Atom
100
Atomic mass?
200.592
100
Atoms of the same element with same number of protons but different number of neutrons?
Isotope
100
Metric (SI) unit for measuring the amount of a SMALL substance
Mole (mol)
100
The area in an atom with a high chance of finding electrons is called
orbital
200
The outermost electrons are called
valence electrons
200
What is the name of the negatively-charged part of an atom?
Electron
200
# protons?
23
200
An unstable isotope that emits (releases) radiation until it decays into a stable isotope is called
Radioisotope (radioactive isotope) (radioactive)
200
To convert from moles to grams, you (add / multiply / divide / subtract)
Multiply
200
Which is a more stable state for electrons: ground or excited?
Ground
300
Which atomic theory said the atom is a positively-charged sphere with negatively-charged electrons throughout it?
Nuclear model
300
Name the 3 subatomic particles of an atom
Proton, neutron, electron
300
# electrons?
*Round to the nearest whole number
45
300
True or False: Isotopes of the same element have different masses.
True
300
# electrons?
*Round to the nearest whole number
24
300
Convert 1.5 moles of xenon to grams
*Round to 1 decimal place
196.9 grams
400
Which atomic theory became the basis for our understanding of atoms?
Nuclear model
400
What subatomic particle(s) is (are) found in the nucleus of an atom?
Protons, neutrons
400
# neutrons?
Round to the nearest full number
42
400
True or False:
The atomic mass of an element is a weighted average of all the element's isotopes.
True
400
# neutrons?
6
400
Convert 200 grams of NaCl to moles
*Round to 1 decimal place
3.4 moles
500
The first and most basic atomic theory was called
Atomism
500
Draw an atom and label the proton, neutron, and electron
500
# protons? # electrons? # neutrons?
p / e = 88
n = 138
500
How are these different?
Different masses OR # of neutrons
500
# protons? electrons? neutrons?
p = 10
e = 10
n = 10
500
Convert 2 moles methane (C2H8) to grams
*Round to 1 decimal place
64.2 grams