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Atoms
History
Table Ticklers
Elemental Madness
Family Facts
100
These carry a positive charge and are found in the nucleus.
What are protons?
100
These people first proposed the idea of the atom.
Who are the Ancient Greeks?
100
The number of protons equals this.
What is the atomic number.
100
This group of elements are the least reactive on the periodic table.
What are the noble (or inert) gases?
100
A group of elements on the periodic table is also known as this.
What is a family?
200
These carry a neutral charge.
What are neutrons
200
This man is responsible for the first periodic table.
Who is Mendeleev?
200
The atomic number equals both of these.
What are protons and electrons.
200
Element #1 on the periodic table.
What is Hydrogen?
200
Groups (or families) run this direction (horizontally or vertically) on the periodic table
What is vertically?
300
These carry a negative charge and are lost, gained, or shared in chemical reactions
What are electrons?
300
Henri Bacquerel discovered this while studying a mineral containing uranium.
What is radioactive decay?
300
The number of protons plus neutrons equals this.
What is the atomic mass.
300
An element that is brittle, not a good conductor, and dull in color can be found in this section of the periodic table.
What are the non-metals?
300
As you move across the metal families from left to right on the periodic table their reactivity generally does this.
What is decrease?
400
The number of these determine the element.
What are protons?
400
This woman, along with her husband Pierre, discovered 2 new radioactive elements: polonium and radium.
Who is Marie Curie?
400
As you travel across the rows from left to right the number of these increase.
What is atomic number or number of protons or number of valence electrons (double points).
400
These are the most reactive non-metals.
What are the halogens?
400
Elements in groups 3 through 12 are known as this.
What is the transition metals?
500
Different isotopes of the same element are determined by the number of these
What are neutrons?
500
The current model of an atom is called this.
What is the cloud model?
500
These are the most reactive group of metals on the periodic table.
What are the alkali metals?
500
These elements share characteristic of both metals and non metals.
What are semimetals?
500
These elements are salt-formers.
What are the halogens?