Which of the following pairs of elements belong to the same group

A. H and He

B. Li and Be

C. C and Pb

D. Ga and Ge

Why is radar useful when mapping areas that tend to be covered in clouds

An insoluble solid is placed in water and the system allowed to reach equilibrium. The ratio of the rate at which ions join the solution and the rate at which ions join the lattice will be: a) greater than one b) one c) less than one d) depends on

2.16 Determine the oxidation states of the element emboldened in each of the following species: (a) S03, (b) NO+, (c) Cr 04, (d) VO, e) PCI

What is the molarity of a solution containing 8.0 moles of solute in a 569 ml of solution?

How many neutrons are there in the nucleus of u92235

What is the chemical formula for potassium permanganate?

Is it always possible to identify something as an element compound pure substance or mixture

Why would someone weigh less on Pluto?

HNO3 + H2O > H3O (aq) + NO3 - (aq)

What do you get when you mix lemons with gunpowder