Discovery of the Atom
Early days, scientist and philosophers believed atoms were made of these
What is air, fire, earth, and water
The positively charged particle of an atom
What is a proton
The chemical symbol that is represented by one or two letters tells you this
What is the name of the element
Developed and organized The Periodic Table
Who is Dimitri Mendeleev
The process plants go through in order to make their own food
What is photosynthesis
Smallest piece of an element that still represents that element
What is an atom
The neutrally charged particle of an atom
What is a neutron
This number tells you how many protons and can also be used to find the number of electrons
What is the atomic number
Atoms of the same element that have different number of neutrons
What is an isotope
D=m/v is the equation for
What is density
Discovered the negatively charged particle using cathode ray tubes
Who is J.J. Thompson
The negatively charged particle of an atom
What is an electron
This number is the sum of both the protons and neutrons
What is the atomic mass number
When an element emits radiation and loses one or more protons from the nucleus it is undergoing what process
What is nuclear decay or radioactive
A change in a substance that does not change the identity of that substance
What is a physical change
Discovered the atomic nucleus and the positively charged particle of an atom through his gold foil experiment
Who is Ernest Rutherford
The place where the negatively charged particles are located
What is the electron cloud
The rows on the periodic table are called this
What are periods
An atom that is no longer neutral because it has either gained or lost an electron is called
What is an ion
This person discovered gravity
Who is Isaac Newton
This person discovered the neutrally charged particle
Who is James Chadwick
The positive and neutral charged particles are located here
What is the atomic nucleus
The columns on the periodic table are called this
What are groups
The average mass of the element's isotopes is called
What is the average atomic mass
Discovered penicillin
Who is Alexander Fleming