Old Atomic Theory
Modern Atomic Theory
Mendeleev's Table
Modern Periodic Table
Elemental Cliques
300
According to Dalton's Atomic Theory, an atom is this
What is the smallest particle of an element.
300
This subatomic particle has a negative charge, and is not located in the nucleus
What is an electron?
300
The discovery of this element supported Mendeleev's decision to leave gaps in his table
What is gallium/germanium?
300
Elements are arranged on the modern periodic table according to these.
What are atomic numbers?
300
The most reactive group of metals
What are the group 1A (alkali metals)?
300

J.J. Thompson demonstrated that electrons have this with his cathode ray tube and charged plate.

What is a negative charge? 200

300

Almost all of the MASS of an atom is located here.

What is the nucleus? 200

300
The elements in Mendeleev's periodic table were organized by this (atomic mass, atomic number, alphabetically)
What is atomic mass?
300

The number of periods in the periodic table

What is seven? 200

300

Elements that have the same number of valence electrons are in this same type of category on the periodic table.

What is a group? T

400
He was one of the first people to state that matter is made up of atoms ( I mean atomos)
Who is Democritus?
400

This is the smallest of the three subatomic particles.

What is an electron (-)? T 

400
Besides their relative masses, Mendeleev also knew this about the elements he organized into a table.
What are properties?
400

This type of element is shiny and conducts electricity really well

What is a metal? 200

400

The group of elements that are all gases at room temperature. (Hint: Extremely nonreactive)

DJ What is group 8A (Noble Gases)?

400
His gold foil experiment proved that atoms contain a densely packed positively charged region (later named the nucleus)
Who is Rutherford?
400
All the atoms of a particular element have the same number of these type of subatomic particles
What are protons (+)?
400
Mendeleev left these on his table because he grouped the elements by their properties.
What are empty spaces?
400
This SI unit is basically one twelfth of a carbon-12 atom.
What is an atomic mass unit (amu)?
400

The most reactive group of nonmetals

What is group 7A (Halogens) 200

500

He provided the first evidence that atoms were made of even smaller particles (sub-atomic)

DJ Who is JJ Thompson

500
This is the number of protons,electrons, and neutrons in a neutral atom of Sulfur-34
What is 16 protons, 16 electrons, and 18 neutrons?
500
The name Mendeleev game the element he predicted would go below aluminum on his periodic table?
What is eka-aluminum?
500
Copper, silver, and gold, are all this type of metal.
What is transition metal?
500
The number of valence electrons in a neutral atom of the element with 84 protons/electrons
What is six?
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