Atomic Theory
The Atom
Subatomic Particles
Differing Atoms
Elements
100
2000 years ago he said that "Atomos" was indivisible and indestructible and moved through empty space.
Who is Democritus?
100
The smallest building block of matter.
What is the atom?
100
The relative electric charge of the proton and its relative mass.
What is +1 and 1 amu (atomic mass unit).
100
The information one gleans from the atomic number of an atom.
What is the number of protons and the number of electrons?
100
The subatomic particle that identifies an element.
What is the proton?
200
He is the father of Modern Atomic Theory.
Who is John Dalton?
200
The atom is made up of three subatomic particles.
What is the electron, the proton, the neutron?
200
The relative negative charge of the electron and its relative mass.
What is -1 and 1/1840 amu.
200
Neutral atoms that have the same number of protons and electrons, but a different number of neutrons.
What is an isotope?
200
Mg.
What is the symbol for Magnesium?
300
He is the first to accidentally discover the existence of the electron using a discharge (cathode-ray) tube.
Who is Sir William Crookes?
300
The nucleus is made up of these.
What are protons and neutrons?
300
The relative neutral charge of the neutron and its relative mass.
What is 0 and 1 amu?
300
The weighted average mass of the isotopes of an element.
What is the Atomic Mass?
300
The symbol for this element is B.
What is Boron?
400
JJ Thompson's model of the atom theorized that the atom was a field of positively charged dough with embedded negatively charged electrons.
What is the Plum Pudding Model of Atomic Theory?
400
Contrary to Bohr's Model, electrons do not orbit the nucleus but exist in a dense concentration called this.
What is the electron cloud?
400
The number of neutrons and protons in a neutrally charged atom, referred to as A.
What is mass number?
400
The distinct number of protons and neutrons in Carbon-14.
What is 6 protons and 8 neutrons?
400
Fr.
What is Francium?
500
Ernest Rutherford proved the existence of this dense positively charged part of the atom when alpha particles collided with it and were deflected.
What is the nucleus?
500
This contains almost all of the atom's mass and its postitive charge.
What is the nucleus?
500
The number of protons in an atom that identifies that element.
What is the atomic number?
500
Most elements are made up of a mixture of isotopes that occur in a specific percentage of abundance in nature.
What is relative abundance?
500
K.
What is Potassium?
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