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Atoms
Elements
Periodic Table
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100
This is a small particle that makes up most types of atoms on earth
What is an atom?
100
Made up of only one kind of an atom
What is an element?
100
This is the number of protons in the nucleus of each atom of an element
What is the atomic number?
100
This scientist's atomic model resembled a chocolate chip cookie.
Who is Thomson?
200
This is an uncharged particle in the nucleus of the atom.
What is a neutron?
200
Elements that have characteristics of metals and non-metals.
What is a metalloid?
200
This is the sum of the an atom's protons and neutrons
What is the mass number?
200
It takes approximately this many electrons to equal the mass of a proton.
What is 2000?
300
These are atoms of the same element that have different numbers of neutrons.
What is an isotope?
300
These types of elements are found on the left side of the periodic table.
What are reactive metals.
300
This is the weighted average of mass of an element
What is atomic mass?
300
Protons and neutrons are measured using this unit.
What is an atomic mass unit or amu?
400
This is a positively charged particle in the nucleus of the atom
What is a proton?
400
These elements are found on the right side of the periodic table.
What are non-metals?
400
The atomic number can also be used to determine the number of these negatively charged subatomic particles
What are electrons?
400
Groups on the periodic table are sometimes called this
What are families?
500
This is a negatively charged subatomic particle
What is an electron?
500
The elements in the middle of the chart
What are non-reactive or less reactive metals?
500
This one to two letter code identifies an element
What is the chemical symbol?
500
This word refers to a "regular, repeated pattern".
What is periodic?