Vocab
Atoms
Periodic Table
People
Miscellaneous
100
A particle with a positive charge in an atom.
What is a proton?
100
Protons, electrons, and neutrons.
What particles make up an atom?
100
a table of elements that is repeated in a pattern
What is the Periodic Table?
100
an ancient Greek philosopher who said that atoms cannot be divided?
who is Democritius?
100
The group that halogens are located in
What is 17?
200
An area around the nucleus where electrons are most likely found.
What is an electron cloud?
200
The sum of the number of protons and the number of neutrons in the nucleus.
What is the mass number of an atom?
200
created the Periodic Table?
Who is Dmitri Mendeleev?
200
said that an atom contains positive and negative charges and that the positive and negative charges are equal?
who is Thompson?
200
the emission of an electron
What is Beta Decay
300
Atoms of the same element that have different numbers of neutrons.
What is an isotope?
300
Particle not found in the nucleus of an atom?
What is proton?
300
Elements are arranged by what in the periodic table.
What is the increasing atomic number and changes in physical and chemical properties?
300
said that the nucleus has electrons orbiting and the nucleus is very small?
who is Rutherford?
300
Element that has similar properties to neon.
What is arsenic?
400
The particles that make up protons and neutrons.
What is a quark?
400
The weight average mass of the mixture of its isotopes.
What is the average atomic mass?
400
the vertical lines of the periodic table
what is groups
400
said that electrons travel in a set orbit and that electrons can only change with a specific energy?
who is Bohr?
400
The emission of a helium particle.
What is Alpha Decay?
500
A diagram that uses dots to represent the number of electrons in the outer energy level.
What is an electron dot diagram?
500
contains most of the mass of the atom?
What is nucleus
500
the state of matter of the elements to the left side of the stair-step line in the periodic table.
What is solid?
500
said that electrons have derived wave forms?
who is Heisenberg DeBrogile?
500
name of the last group on the periodic table.
What is Noble Gases?
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