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Your Questions About How To Discover New Elements

Ruth asks…

suppose that a newly discovered element called centium has three isotopes that occur in nature.?

suppose that a newly discovered element called centium has three isotopes that occur in nature. these are centim-200, centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element?

New Niche Finder answers:

This is no different than getting the average of anything, not just isotopes atomic masses.

If you had a rock that weighed 20 pounds and one that weighed 40 pounds, the average weight would be 20 plus 40 divided by 2

(20 + 40) / 2 = 60 / 2 = 30

Or calculating the average amount of water when one bottle had 1 gallon of water in it and another bottle had 1/2 gallon of water. (1 + 1.5)/2 = 2.5 / 2 = 1.25

You did not tell us the atomic weight of the third isotope so I will show you the answer as if there were only two isotopes.

(200 + 209) / 2 = 409/2 = 204.5

Add up the “thing” of which you want an average (atomic weights, gallons of water, weight of rocks, etc) of the objects and divide by the number of objects you have.

Nancy asks…

What is the total number of elements in the periodic table this year 2010?

I have to know what is the latest total number of elements in the periodic table as well as the recently discovered element. Thank you!

New Niche Finder answers:

As of 2010, the table contains 118 chemical elements whose discoveries have been confirmed.
The recently discovered element is Ununoctium, It has the highest atomic number and highest atomic mass of all discovered elements.

Hope this helps :)
xx

John asks…

How many grams of the element could be held in a container with a volume of 115 mL?

The density of a newly discovered element is found to be 10.08 g/mL. How many grams of the element could be held in a container with a volume of 115 mL?

New Niche Finder answers:

Density = mass/volume

mass = density * volume

mass = (10.08)(115)

mass = 1159.2 grams

William asks…

How many grams of the element could be held in a container with a volume of 122 mL?

The density of a newly discovered element is found to be 6.78 g/mL. How many grams of the element could be held in a container with a volume of 122 mL?

New Niche Finder answers:

If the density is 6.78g per ml then for 112ml the number of grams would be 6.78g x 122 = 827.16g

Betty asks…

What is the relative percentage of these isotopes?

A newly discovered element Q is found to have 2 isotopes 155Q and 157Q. If the average atomic mass is 156.30 amu what are the relative percentages of the two isotopes?

New Niche Finder answers:

It is a mathematical problem.

First you need two equations and two unknowns.

Let´s call 155Q= x and 157Q= y (the relative percentages of both isotopes)

155*X + 157* Y = 156.30
X+Y = 1 (because the discovered element presents two isotopes)

Whenever you resolve the system

X=0.35 and Y=0.65

Good luck

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