Atomic Structure
True or false, the number of neutrons in an atom has a large effect on its properties.
What is FALSE?
Developed the first atomic theory that states that mater is made of atoms and all atoms of the one element are alike.
Who is John Dalton?
The number of electrons that the first orbital can hold?
What is 2?
Elements in this group are used in fireworks because they are quite reactive.
What are alkaline earth metals?
This is the latin word for gold.
What is aurum?
This atom has no neutrons/
What is hydrogen?
This Greek Philosopher pondered the existence of atoms and of matter being broken down into a basic unit called the atomos.
Who is Democritus?
The name, meaning indivisible, that was given to the smallest substance imaginable.
What is an Atom?
This is the most common element in the earth's crust.
What is oxygen?
These two elements make up table salt.
What are sodium & chlorine?
The name given to Rutherford's model of atom.
What is nuclear (or planetary)?
He rejected the ideas of Democritus?
Who is Aristotle?
This law states that matter cannot be created or destroyed but can change forms.
What is the Law of Conservation of Mass
This element is required for life.
What is carbon?
The top number on each block in the periodic table represents this.
What is atomic number?
Rutherford observed the existence of ________ charged particles in the center of an atom through his gold foil experiment.
What are positively?
He developed the idea that electrons orbit around the nucleus like planets.
Who is Niels Bohr?
This is an atom of an element with the same number of protons but different number of neutrons.
What is an isotope?
This group is the most unreactive.
What is nobel gases?
The eight "A" Groups on the periodic table have similar properties and also tell us how many _____ ______ are in the outer shell of the atom.
What are valence electrons?
JJ Thompson compared the atom to this.
What is plum pudding?
He organized elements across the rows by increasing mass into a chart and called it the Periodic Table.
Who is Mendeleev?
This law states that samples of a pure compound always have the same elements in the same mass proportion.
What is the law of constant composition?
This word means "salt-former".
What is Halogen?
This is the region of space around the nucleus where electrons are most likely to be found.
What is orbital?