What element has three electrons in its 5d sublevel?

Select one:

a. Nd

b. Nb

c. Ta

d. U

Question In a molecule of chlorine (Cl2), the chlorine atoms are connected to each other by a single bond. :Ci - ci: Which statements correctly describe this bond? Select all the correct answers. It contains electrons from the first energy level.

Collect information and write how the coronavirus pandemic is affecting the carbon dioxide emission

Which of these is not true about the proton? A. When a neutral hydrogen atom loses an electron, the proton remains. B. A proton is about 2000 times heavier than an electron. C. Electrons surrounding atoms get pulled into the nucleus by protons. D.

ZnO + 2HCl - - > ZnCl2 + H2O what is the maximum amount of ZnCl2 which could be formed from 3.52 mol of ZnO and 18.82 mol of HCl

A chemist is looking at an electrically neutral atom that has three valence electrons. If she knows the element is a metalloid, which one (or ones) is it?

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.

One mole of which hydrocarbon requires 8 mol o2 to achieve complete combustion to give carbon dioxide and water?

How many bromine atoms are present in 39.9 g of CH2Br2