Who are these people?
Atom and Eve
The Same, But Different
Count on it
That's it. Period.
100
Ernest Rutherford's experiment involved shooting alpha particles at this.
What is GOLD FOIL?
100
This is the center of an atom, where almost all of the mass is located.
What is the NUCLEUS?
100
This is what we call atoms of the same element that have different numbers of neutrons.
What are ISOTOPES?
100
This is the number of elements in the top-most row of the periodic table.
What is TWO?
100
This is the name of the chart that organizes elements into rows and columns.
What is the PERIODIC TABLE?
200
J.J. Thomson's used this "electrically charged" glass tube to discover the electron.
What is the CATHODE-RAY TUBE
200
These are the three sub-atomic particles in an atom.
What are PROTONS, NEUTRONS and ELECTRONS?
200
This is the number of known isotopes of Hydrogen.
What is THREE (3)?
200
This is unit is equivalent to one-twelfth the mass of a carbon atom.
What is an ATOMIC MASS UNIT?
200
This is what we call a horizontal row on the periodic table.
What is a PERIOD?
300
The Greek philosopher Democritus' idea of the atom claimed that atoms had these two characteristics.
What are INDIVISIBLE and INDESTRUCTIBLE?
300
These subatomic particles actually have no charge, but do contribute to an atom's mass number.
What are NEUTRONS?
300
Even though isotopes have different numbers of neutrons, the number of these positively charged particles NEVER changes.
What is a PROTON?
300
Counting from the upper-left corner, this element is the 6th element on the periodic table.
What is CARBON?
300
This number in an element's box represents the number of protons in the element's nucleus.
What is the ATOMIC NUMBER?
400
U.S. Physicist Robert Millikan determined the mass of this negatively charged particle.
What is the ELECTRON?
400
This English Chemist developed Democtritus' ideas into a full-fledged theory about the atom.
Who is (JOHN) DALTON?
400
*When we account for each isotope in an atoms mass, the result is called this.
What is the AVERAGE ATOMIC MASS?
400
This is the number of protons in the nucleus of an Oxygen atom.
What is EIGHT?
400
This is what we call the vertical columns on the periodic table.
What are GROUPS or FAMILIES?
500
J.J. Thomson's early, short-lived model of the atom was called this.
What is the PLUM PUDDING MODEL
500
*Despite their small size, atoms are observable with instruments such as this.
What is a SCANNING TUNNELING MICROSCOPE?
500
Because atoms are electrically neutral, they must have the same number of these two charged particles.
What are ELECTRONS and PROTONS?
500
This is the number of ways that Thomson observed that his cathode ray could be diverted.
What is TWO?
500
This number represents the sum of the protons and neutrons in an atom.
What is the MASS NUMBER?
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