Show:
Atoms
Atomic History
Periodic Table
Elements
Vocabulary
100
This is a small particle that makes up elements on earth.
What is an atom?
100
This man ran the gold foil experiment which showed that atoms are mostly empty space.
Who is Ernest Rutherford?
100
A column on the periodic table is also known as what?
What is a group?
100
This element makes up salt and explodes when it is in contact with water.
What is sodium?
100
The chart that arranges elements by atomic number.
What is the periodic table?
200
True or False. Electrons are embedded in a positively charged sphere.
What is the false?
200
This man discovered the electron and the plum pudding model of the atom.
Who is JJ Thomson?
200
A row on the periodic table is known as what?
What is a period?
200
This element makes up most living things and is the main component of diamonds and pencil lead.
What is carbon?
200
The outermost electrons in an atom are known as these.
What are the valence electrons?
300
This is the subatomic particle that the atomic number represents.
What is a proton?
300
This English chemist came up with the first modern theory of the atom.
Who is John Dalton?
300
For columns 1-2 and 13-18, what does the column number tell us about the electrons?
What is the number of valence electrons?
300
This element is used to keep swimming pools clean and is causes burning when breathed in.
What is chlorine?
300
When you add protons and neutrons, you get this.
What is the atomic mass?
400
Atoms that have the same number of protons but different numbers of neutrons are called what?
What is an isotope?
400
This man revised the atom's model to include electron orbitals.
Who is Niels Bohr?
400
This is the name for group 17.
What are halogens?
400
This element is used in computers to conduct electricity, and makeup to keep it silky smooth. This is what the Bay Area is known for.
What is silicon?
400
The shells that electrons fill are known as these.
What are orbitals?
500
When atoms gain or lose electrons, they become known as these. (List both names)
What are cations and anions?
500
This Greek philosopher came up with the original theory of the atom.
Who is Democritus?
500
This divides the periodic table into metals and nonmetals.
What is the staircase?
500
This element is a strong, lightweight metal which is often used in soda cans.
What is aluminum?
500
These look like metals, but behave like nonmetals.
What are metalloids?