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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.
Who is John Dalton?
The number of electrons that the first orbital can hold.
What is 2?
These two elements make up table salt.
What is sodium and chlorine?
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.
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?
This makes fireworks colored differently.
What are different metals exploding?
The name given to Rutherford's model of an 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 discovered that certain elements emit fast moving passively charged particles that he called ____.
What are alpha particles?
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 and electrons but a different number of neutrons.
What is an isotope?
This is the only noble gas that cannot be used to make neon light.
What is radon?
This atom has a mass number of 4, with 2 protons and 2 electrons.
What is Helium?
JJ Thompson compared the atom to this.
What is plum pudding?
He placed elements across the rows by increasing mass.
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 regionals of space around the nucleus where electrons are most likely to be found.
What is orbital?