Atomic Theory Scientists
This scientist discovered the electron and developed the plum pudding/ Chocolate chip model
JJ Thomson
This particle has a positive charge.
A proton
What three particles make up an atom
proton, neutron, and electron
This element has 20 protons.
Calcium
How many protons and neutrons does Iron have?
26 protons and 30 neutrons
This Scientist proved the "Plum Pudding" theory wrong using the "Gold Foil Test"?
Ernest Rutherford
This particle has no charge and helps to keep the nucleus in tact.
A neutron
The atomic number is the same as the number of this particle.
A proton
How many electrons does H have?
1 electron
How many protons, electrons, and neutrons does Argon have
Neutrons = 22
Electrons = 18
This scientist described the atom as the smallest, most indivisible piece of matter and proposed 4 postulates/laws regarding atomic theory.
John Dalton
This particle gives an atom it's negative charge.
An electron
What is the atomic number?
The number of protons in the nucleus
This element has 30 electrons
Zinc
How many protons, neutrons, and electrons does Fluorine have?
protons = 9
neutrons = 10
electrons = 9
The first person to arrange the elements in a periodic table.
Dmitri Mendeleev
These 2 particles have a relative mass of 1
Protons and neutrons
This is the formula for mass number.
What is # of protons + # neutrons?
The element with a mass # of 23
Sodium
How many protons, neutrons, and electrons does Silicon have?
neutrons = 14
electrons = 14
An ancient Greek philosopher who theorized that there must be some particle that is the smallest form of matter and called it "atomos".
Democritus
This particle has virtually no mass, but contributes mostly to the volume of the atom.
An electron
How is an element identified?
Identified by the number of protons, atomic number, or electrons
This element has 4 protons and 5 neutrons
Beryllium
How many protons, neutrons, and electrons does Silver have?
protons = 47
neutrons = 61
electrons = 47