Symbols
Valence Electrons
Electrons
Families
Nucleons
100
The symbol for tin.
What is Sn?
100
The number of valence electrons for carbon.
What is 4?
100
The number of electrons in an atom of hydrogen.
What is 1?
100
A family of elements that contains lithium.
What are the Alkali metals?
100
The number of protons in carbon-14.
What is 6?
200
The symbol for hydrogen.
What is H?
200
The number of valence electrons in an atom of oxygen.
What is 6?
200
The number of electrons in an atom of argon.
What is 18?
200
A family of elements that contains gold and copper.
What are the transition metals?
200
The number of neutrons in carbon-14
What is 8?
300
The symbol for potassium.
What is K?
300
The number of valence electrons in an atom of argon.
What is 8?
300
The number of electrons in an atom of potassium.
What is 19?
300
Elements that are highly radioactive and difficult to distinguish from each other.
What are the lanthanides and actinides?
300
The number of protons in neon?
What is 10?
400
The symbol for sulfur.
What is S?
400
The number of valence electrons in an atom of sodium?
What is 1?
400
For an atom to have no net charge, it most contain an equal number of electrons to the number of ________ in its nucleus?
What are protons?
400
The most reactive elements in the periodic table.
What are the Alkali metals?
400
The number of nucleons in carbon-14.
What is 14?
500
The symbol for thorium?
What is Th?
500
The number of valence electrons in an atom of bromine.
What is 7?
500
The number of electrons in a positive ion of lithium with a charge of +1.
What is 2?
500
A family of elements consisting of gases with very low reactivity.
What are the noble gases?
500
A subatomic particle located in the nucleus of an atom that has a positive charge.
What is a proton?
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