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Periodic Table
Symbols
Atomic Structure
Models and Experiments
Counting Atoms
100
Who created the periodic table?
Dmitri Mendeleev
100
What is the symbol for Neon?
Ne
100
What two particles are found in the nucleus?
What is Protons and Neutrons
100
Thomson used what type of glass tube to carry out his experiments?
Cathode Ray Tube
100
The ______ ______ of an element is the number of protons in the nucleus of each atom of that element.
Atomic Number
200
Rows are called _____.
Periods
200
What is the symbol for Carbon-14
C-14
200
Protons and Neutrons are measured in what Units?
Atomic Mass Unit
200
What did Thomson Discover using the Cathode Ray tube?
Electrons
200
Atoms of the same element that have different masses.
Isotopes
300
Columns are called ______.
Families or Groups
300
What is the symbol for Niobium?
Nb
300
Why are atoms neutral?
Equal Number of Protons and Neutrons
300
What was Dalton's Model for the Atom?
A Solid Sphere
300
The total number of protons and neutrons in the nucleus of an isotope
Mass Number
400
Which noble gas was discovered in 1900 by German Scientist Friedrich Ernst Dorn?
Radon
400
What is the symbol for Ytterbium?
Yb
400
Most of the atom's mass is in the _____.
Nucleus
400
What experiment did Ernest Rutherford conduct?
The gold Foil Experiment, Bombarded Gold Foil With Alpha Particles
400
The weighted average of the atomic masses of the naturally occurring isotopes of an element.
Average Atomic Mass
500
By 1860, how many elements had been discovered?
60
500
What is the symbol for Lithium?
Li
500
What unit is used to measure the atomic radius?
the picometer
500
What did Rutherford discover?
The Nucleus
500
Name the three isotopes of Hydrogen
Protium, Deuterium, Tritium