Ask a question
Periodic table
admin
Which atom has the larger atomic radius? a) Fr b) F
To answer Answers (1)
Periodic table
admin
Which of these two atoms is paramagnetic? Cd or Tc Which atom is larger?
To answer Answers (1)
Periodic table
admin
Transition metals are: (a) d-block metals (b) Metals with incomplete d-subshells either in neutral atoms or ions (c) Metals from the 3d and 4-d series
To answer Answers (1)
Periodic table
admin
Iron, cobalt, and nickel are similar in properties and are sometimes studied together as the “iron triad.” For example, each is a fairly active metal that reacts with acids to give hydrogen and the +2 ions. In addition to the +2 ions, the +3 ions of the m
To answer Answers (1)
Periodic table
admin
Why do La3+, Lu3+, or Gd3+ compounds not show luminescence properties? Lanthanide and Actinide Chemistry Why is the Ce3+(4f1) ion colorless whereas Ti3+ solutions (3d1) are purple? why the electronic spectra of Pr3+ (4f2) consist of a number of weak sharp
To answer Answers (1)
Periodic table
admin
Is iron a metal, nonmetal or metalloid?
To answer Answers (1)
Periodic table
admin
Why does silicon form only single bonds with oxygen but carbon, which is in the same family as silicon, form double bonds with oxygen in many compounds?
To answer Answers (1)
Periodic table
admin
Why is TiO2 preferred over white lead as a white paint pigment?
To answer Answers (1)
Periodic table
admin
Write the long and short electron configuration for Ni^{2+}
To answer Answers (1)
Periodic table
admin
Which chemical element has the longest name?
To answer Answers (1)
Periodic table
admin
What chemical element is blue?
To answer Answers (1)
Periodic table
admin
The solutions of both Ag^+ and Zn^{2+} ions have no colour. What does this suggest about their electron configurations?
To answer Answers (2)
Главная › Science › Periodic table
Authorization
*
*

Entry Lost your Password ?
Password generation
Get New Password