Show:
Atomic Scientists
Subatomic Particles
Ions and Isotopes
Atomic Mass
The Mole
100
This person first claimed that atoms existed.
Who is Democritus
100
This particle has a charge of +1.
What is a proton?
100
An ion is an atom with a _______.
What is charge?
100
Atomic mass is defined as the _________ average of all an element's isotopes.
What is weighted?
100
The mole is the SI unit of __________.
What is counting?
200
This French scientist gave us the Law of Definite Proportions.
Who is Proust?
200
This particle is the only one not found in the nucleus.
What is an electron?
200
An ion with a charge of +2 has more of which subatomic particle?
What is a proton?
200
To calculate the atomic mass of an element, one needs to know both the isotope mass and the percent __________.
What is abundance?
200
Another name for the mole is ____________ number.
What is Avogadro's number?
300
The Law of Conservation of Mass states that matter is neither ________ nor _________ in any physical or chemical process.
What is created, destroyed
300
Neutrons have this charge.
What is zero/neutral?
300
A Copper ion with a charge of +1 has this many electrons.
What is 28?
300
The atomic mass of an element is always given in the unit ____.
What is amu (atomic mass unit)?
300
The number of atoms in a mole is always ___________.
What is 6.02 x 10^23?
400
J.J. Thomson's cathode ray tube led him to discover this particle.
What is the electron?
400
Rutherford's radioactive particles used in his experiment were called _____ particles.
What are alpha particles?
400
An isotope of Calcium has a mass number of 41, so it must have ___ neutrons.
What is 21?
400
If the atomic mass of Lithium is 6.941 amu, which isotope is more abundant, Li-6 or Li-7?
What is Li-7?
400
The mass of one mole of an element's atoms is called its _______ mass.
What is molar?
500
Ernest Rutherford's gold foil experiment led him to believe that most of the volume of an atom is occupied by this particle.
What is the electron?
500
This particle is the heaviest of the three subatomic particles.
What is a neutron?
500
An isotope of Argon contains 22 neutrons; its mass number is ___.
What is 40?
500
The sum of the abundances of all an element's isotopes must equal _____.
What is 100%?
500
There are 50.0 grams of Titanium atoms sitting in a beaker. This is (>,<,=) one mole.
What is > one mole?