Select the correct electron configuration for Vanadium. (Atomic Number 23)

1s 2 2s 6 2p 3 3s 2 3p 4 4s 2 3d 5

1s 2 2s 2 2p 6 3s 2 3p 8 4s 2 3d 1

1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 3

1s 2 2s 2 2p 5 3s 2 3p 7 4s 1 3d 4

What's the definition of condensation, vaporation and deposition?

0.422 g of an element z reacts with oxygen to form 0.797 g of the oxide z2o3. what is the element z?

The ion formed by an atom of a metal is an?

Francium is a naturally occurring radioactive element. At any moment there is probably no more than an ounce of francium on earth.

An opened bag of chips expanding as on drives up a mountain is a good example of how volume

2NO + O2 → 2NO2 What type of chemical reaction is shown above? a combustion reaction b double displacement C synthesis d decomposition e single displacement

Why did Bromophenal solutions change from yellow to blue (what chemical reaction happended) ?

How many milliliters of calcium, with a density of 1.55 g/mL, are needed to produce 85.8 grams of calcium fluoride in the single replacement reaction below? Show all steps of your calculation as well as the final answer.

If object A is placed on the pH scale at pH = 3 and object B is placed at pH = 8, which of the following must not be true? A. Object B has a higher hydroxide ion concentration than object A. B. Object B is closer to a neutral pH than object A. C.

Laboratory safety is not an important concern for scientists. True or false