Atomic Structure
Periodic Table
Chemical Formulas
Physical / Chemical Properties
Riddles
100
The atomic number of an atom with 9 protons, 7 neutrons, and 8 electrons.
What is 9?
100
This is how can a person tell which elements have SIMILAR properties to another element, using the periodic table.
What is the same GROUP or FAMILY?
100
The chemical formula for magnesium chloride?
What is MgCl2?
100
The type of change for ice melting.
What is Physical Change?
100
I am the element in Group 15, Period 6.
Who is Bismuth?
200
The subatomic particles of an atom that determines the atom's IDENTITY.
What are protons?
200
This is the value on the Periodic Table that tells you the number of electron shells/orbitals for each element.
What is the PERIOD number? (i.e. All elements in PERIOD 2 have TWO electron shells)
200
The chemical formula for dinitrogen tetrafluoride.
What is N2F4?
200
The type of change when bubbles are formed.
What is a chemical change?
200
I have 3 electron shells and 16 neutrons.
Who is Phosphorous?
300
The overall charge of an atom with 5 protons, 5 neutrons, and 4 electrons.
What is 1+?
300
The name of the elements found on the staircase on the Periodic Table.
What are Metalloids?
300
The name of P3Cl6.
What is TRIphosphorous HEXAchloride?
300
Acid dissolving wood is this kind of change.
What is a chemical change?
300
I have 2 valence electrons and 12 protons.
Who is Magnesium?
400
The subatomic particles found at the center of an atom.
What are Protons and Neutrons?
400
The name and group number of elements that are the MOST reactive on the Periodic Table.
What are alkali metals and Group 1?
400
The formula for sulfuric acid.
What is H2SO4?
400
Two physical properties of metals.
What are... Malleable Luster/Shiny Conductor of heat and electricity Ductile
400
I am the only element without any neutrons.
Who is Hydrogen?
500
This is the order of neutron, electron, atom, and molecule from GREATEST to LEAST mass.
What is MOLECULE, ATOM, NEUTRON, ELECTRON?
500
The element with the GREATEST electronegativity.
What is Fluorine?
500
The equation not balanced out of C3H8 + O2 → 3CO2 + 4H2O RbBr + AgCl → AgBr + RbCl AlO3 + 3H2 → Al + 3H2O Zn + 2HCl → ZnCl2 + H2
What is C3H8 + O2 → 3CO2 + 4H2O ?
500
FOUR examples of evidence that a chemical reaction is taking place.
What are Color change, Precipitate (solid) forms, Bubbles form (gas released), and Temperature changes (either hot or cold)?
500
I am a Noble Gas with one electron shell.
Who is Helium?
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