Understanding the Atom
The smallest particle that still represents an element
What is an atom?
This scientist theorized that matter was made up of atomos
Who is Democritus?
Aristotle believed Democritus was wrong because of this
What is "empty space"?
The number of _______ determines what element it is
What are protons?
Who is Henry Becquerel?
Maria Curie played a major role in researching and making the connection that it was radioactivity that Henry was seeing in his lab. But Henry gets the credit.
The negatively charged particle found outside the nucleus
What is an electron?
This not as famous scientist discovered the neutron
Who is James Chadwick?
Atoms are radioactive because of this
What is an imbalance of protons and neutrons?
An atom that has differing number of neutrons is known as this
What is an isotope?
Quarks are believed to make up these sub-atomic particles
What are protons and neutrons?
The positively charged particle in an atom
What is a proton?
Who is J.J. Thomson
In Gamma decay this happens to an atom
What is "give off energy"?
The atomic number tells us this about an atom
What are the number of protons?
*It also tells us the number of electrons, but that is not the purpose of the atomic number
Atoms that gain an electron have this charged and are called this type of ion
What is negatively charged atom?
What is an anions?
These sub-atomic particles are found in the nucleus of the atom
What are protons and neutrons?
The Gold Foil Experiment that proved that protons were in center of an atom was conducted by
Who is Earnest Rutherford?
When 2 protons and 2 neutrons are emitted from a radioactive atom we call it this
What is alpha decay or alpha radiation?
A chlorine atom has 17 protons. If it has 17 electrons and 18 neutrons it is called
What is Chlorine-35?
What is Cl-35?
*Both answers are correct, just 2 ways of writing it.
A cation is this
What is a positively (pawsitively) charged ion?
An elements ______ is the same as the number of protons in the nucleus of its atom
What is atomic number?
The idea that electrons circled around the nucleus of an atom in an "orbit" or "energy levels" was proposed by
Who is Neil's Bohr?
In Beta Decay these two sub-atomic particles can change into each other
What is a proton and neutron?
*a proton can turn into a neutron
OR
a neutron can turn into a proton!
The isotope Sodium-16 has 11 protons, therefore it has this many neutrons
What is 5?
16-11=5
A neutral atom would become an ion that has a charge of 2+ by doing this
What is losing two electrons?