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Elementary Math
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100
Electrical conductivity is a _____ property.
What is a physical property?
100
This scientist invented the Bohr model.
Who is Neils Bohr?
100
This element is often paired with hydrogen, creating a compound known as water.
What is oxygen?
100
The number of protons hydrogen has if it has 1 neutron and a mass of 1.01.
What is .01 protons?
100
The name of the horizontal rows and the vertical rows.
What are periods and groups?
200
This property can be measured after a change in the substance.
What is a chemical property?
200
This Russian scientist created the Periodic Table.
Who is Dimitri Mendeleev?
200
This element is a noble gas with eight valence electrons that is used in brightly lit signs.
What is neon?
200
The number of protons sodium has if it has 11 neutrons and a mass of 22.99.
What is 11.99 protons?
200
The energy required to remove an electron is called ________ energy.
What is ionization energy?
300
A _____-______ reaction is when an element replaces another in its combined form.
What is a single-displacement reaction?
300
This scientist discovered that electrons move in a straight path.
Who is William Cook?
300
This metallic element, with the symbol Na, is found in salt.
What is sodium?
300
This is the number of valence electrons all noble gases have.
What is eight?
300
The electrons on the outermost shell of an atom are called _______ electrons.
What are valence electrons?
400
_______ ions are atoms that have gained electrons, and _______ ions have lost electrons.
What are 1) positive ions, and 2) negative ions.
400
He said, "Electrons are always the same, no matter what the element."
Who is J.J. Thomson?
400
This non-metallic element, with an atomic number of 17, is often used in swimming pools and hot tubs.
What is chlorine?
400
This is the number of metalloids in the Periodic Table.
What is seven?
400
As the atomic number increases, the ionization energy _______.
What is "decreases"?
500
These diagrams explain the formation of compounds (Lewis Structure).
What are electron dot diagrams?
500
This scientist found that the charge of an electron are always multiples of a very small number.
Who is Robert Millikan?
500
With an atomic mass of 63.55 and a symbol of Cu, this element is a high conductor of electricity. (Think of pennies!)
What is copper?
500
The number of protons gold has if it has 79 neutrons and a mass of 196.97.
What is 117.97 protons?
500
A ____ bond is formed when two atoms combine, and an ______ bond is the attraction between oppositely charged ions.
What is a covalent bond and an ionic bond?