atomic structure
periodic table
nuclear chemistry
chemical bonding
nomenclature
100
An element with 16 neutrons, 15 protons and 15 electrons
What is Phosphorus
100
Which of the above elements would have the same properties as Iodine?
Manganese , Chlorine, Xenon, Tellurium
What is Chlorine?
100
The type of radiation that can be blocked by a 2 cm thick cardboard.
What is alpha radiation?
100
The type of bond where oppositely charged ions attract
What is ionic bond?
100
The chemical formula for Magnesium Bromate?
What is Mg(BrO3)2?
200
Where the mass of the atom is mostly concentrated
What is nucleus?
200
Which of the following elements has both metallic and nonmetallic properties?
Ar ,Ge , Mg , S
What is Ge?
200
How the atomic mass and atomic number changes when a gamma ray is emitted.
What is no change?
200
The number of protons and electrons in a
64 29 Cu 2+ ion
What is 29 protons and 27 electrons?
200
the name of the compound with the chemical formula CrCl3
What is Chromium Chloride?
300
Which of the following atoms has six valence electrons?
magnesium (Mg)
silicon (Si)
sulfur (S)
argon (Ar)
What is sulfur?
300
The group in the periodic table with the lowest ionization energy.
What is Alkali metals or group 1?
300
The decay product represented by X in the decay equation 238 92 U = 4 2 He + X .
What is 234 90 Th ?
300
The number of bond made on N2, O2, and F2 respectively
What is triple, double and single bond?
300
the correct name for the acid whose chemical formula is H2SO4
What is Sulfuric Acid?
400
The element that is represented by this Bohr model
What is Silicon?
400
The pair of elements that shows an increase in atomic number but a decrease in atomic mass.
Cr and MoPd and Ag
Co and Ni
Ge and Sn
What is Co and Ni?
400
What is left of an original Polonium sample after three half lives have passed.
What is 12.5%
400
The charge of Sulfate in Sulfuric acid
What is -2?
400
The chemical formula for aluminum oxide
What is Al2O3?
500
Element X has an atomic number of z. Which of the elements below has an atomic number of z + 2 ?
What is G?
500
Arrange the following elements in order of increasing electronegativity.
F, Be, O, Li
What is Li, Be, O, F?
500
How many grams of a 10g sample of Osmium with a 21.5 hours half life is left after three half lives?
What is 8.75 g?
500
The charge of Nitrogen in the compound Nitrogen Triflouride
What is +3?
500
The name of the compound with a structural formula of
What is Nitrogen Trifluoride?