1.15 g of a metallic element reacts with 300cm3 of oxygen at 298K and 1 atm pressure, to form an oxide which contains O2 - ions.

What could be the identity of the metal?

A calcium

B magnesium

C potassium

D sodium

In k4[fe (cn) 6], how many 3d electrons does the iron atom have?

Californium-252 is bombarded with a boron-10 nucleus to produce another nuclide and six neutrons. what nuclide forms?

If sodium arsenite is Na3AsO3, the formula for calcium arsenite would be

What are the s, p, d, f blocks on the periodic table?

Deuterium is the common name for A. Hydrogen-1 B. Hydrogen-3 C. Hydrogen-2 D. Hydrogen-0

Which of the following is diamagnetic? A) Sn B) Pb 2+ C) I D) N E) All are paramagnetic

Based on your observations in the lab, what do you think happens to the majority of water (not, ice) at the poles? at the equator?

How do organisms interact with each other and how can one organism be dependent upon other species

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission

Which of these is the main goal of any titration? to observe the effect of indicators on acids to observe the effect of indicators on bases --> (((to determine the concentration of one of the reactants))) <--- to determine the effects of a base on