Hydrogen
Here are two isotopes of hydrogen, what are they
D and T
What is the least dense metal?
Li
What is the oxidation state of C in CO
+2
Identify the orbital that has n=6 and l=0.
6s
What is oxidation?
Increase in oxidation number
Whose boiling point is higher, HF or HCl
HF
What is the formula for Lithium oxide
Li2O
what is the difference between oxidation state of C and Si
Si does not have +2 oxidation state
the highest atomic number element for which stable isotopes exist
Pb-126
What is the oxidation number of C in HCN?
+2
The liquid phase of water is denser than the solid phase, why?
hydrogen bonding
What is the reaction for the industrial extraction of sodium?
Na+(NaCl) + e- > Na(l)
what is the common composition of common glasses
SiO2
For the elements sodium and magnesium, which has the higher first ionization energy?
Mg>Na
Define the term: oxidizing agent
a substance that tends to bring about oxidation by being reduced and gaining electrons.
what is the actual molecule formula of titanium hydride
(Ti 4+ )(H-) 1.9 (e-) 2.1
Why is the solubility of NaI higher than that of NaF?
Free energy change of NaI is negative
What is the most stable oxide of tin?
SnO2
Which would you expect to have the higher boiling point, hydrogen sulfide, H2S, or hydrogen selenide, H2Se?
H2Se
Write a half-reaction for the following oxidation in acid solution: NH4+(aq) --->NO3-(aq)
NH4+(aq) +3H20(l) --->NO3-(aq) + 10H+ (aq) +8e-
Which group does hydrogen belong to?
It does not belong to any group.
Here is a metal in alkali metals group found to be slightly radioactive, what is it?
Kk
What is the structure of silicon dioxide
Each silicon atom is bonded to four oxygen atoms, and each oxygen atom is bonded to two silicon atoms
Chromium forms a body-centered cubic lattice in which the edge length of the unit cell is 288 pm. Calculate (a) the metallic radius of a chromium atom.
Is the perchlorate ion a stronger oxidizing agent at pH 0.00 or at pH 14.00?
pH0.00