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Miscellaneous
Vocab
Defining the Atom
Atom Structure
People
100
What is an atomic mass unit
A unit of mass equal to one-twelfth the mass of carbon-12 atom is named an?
100
Atomic Mass
What is the weighted average of the masses of the isotopes od an element?
100
Who transformed Democritus's ideas on atoms into a scientific theory?
Dalton
100
What is neutral
The charge of a neutron is?
100
Democritus
who was the first to suggest the existnace of atoms?
200
What is zero
The wave cycle starts at?
200
Mass Number
The total number of prtons and neutronss in the nucleus of an atom is?
200
Democritus
Who believed that atoms were indivisible and indestructible?
200
What is positive and negative
What are the charges of an electron and proton?
200
Greek
What kind of phylosopher was Democritus?
300
What is J.J. Thomson?
In 1897 he discovered the electron
300
Excited State
What is is the highest possible energy of an atom?
300
Observe individual atoms
What is a scanning tunneling microcopes used for?
300
What is the lowest possible energy in an atom
What is the the ground state is known as?
300
John Dalton
An English chemist and schoolteacher?
400
What is particles
According to Issac Newton's theory the behavior of light consists of?
400
Number of wave cycles that pass a given point per unit of time
What is frequency?
400
Nucleus
Where are protons and neutrons located in the nuclear atom?
400
Repel
A neutron and a neutron repel or attract?
400
A television tubewe that specialized elcetrons to travel as a ray
The cathode-ray was?
500
Electrons, neutrons, protons
What are three subatomic particles?
500
Wave length
What is a distance between adjacent srest of a wave?
500
Electrons
Which of the three subatomic particles are distributed around the nucleus?
500
What is Law of conservation of mass
What is the law in which that in any phsyical change or chemical reaction, mass is conserved?
500
An english physicist J.J. thomson
Who discovered the ecletron using the cathode ray?