During fractional distillation, hydrocarbons are separated according to their
boiling points
300
An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of
5
300
What is the oxidation number of carbon in NaHCO3?
+4
400
In the Gold Foil experiment, most of the particles fired at the foil
passed through the foil
400
Which of these elements does not exist as a diatomic molecule?
Ne
H
F
I
Ne
400
The products of the fermentation of sugar are ethanol and
carbon dioxide
400
Which halogens are gases at STP?
chlorine and fluorine
chlorine and bromine
iodine and fluorine
iodine and bromine
chlorine and fluorine
400
Given the reaction: ZnO + X + heat -> Zn + XO
Which element, represented by X, is used industrially to reduce the ZnO to Zn?
Cu
C
SN
Pb
C
500
Atoms of the same element that have differrent masses are called
They contains different numbers of
Isotopes
neutrons
500
What causes hydrogen bonding?
bonding of a covalently bonded hydrogen atom with an unshared electron pair
500
Draw the Lewis Structure of CH3OOH
500
The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?
2
500
Which atoms forms an ion that would migrate toward the cathode in a electrolytic cell?
F
I
Na
C