Science/Math

Hello,

Suppose that a newly discovered element called centium has three isotopes that occur in nature. These are centium-200, centium-203, and centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element?

1. 👍
2. 👎
3. 👁
1. Atomic mass
= 200*(1/3)+ 203*(1/3) + 209*(1/3)
= 204

1. 👍
2. 👎
2. 867

1. 👍
2. 👎
3. A STONE MEASURED 25KG WAS ACTULLAY 20 KG WHAT WAS THE PERCENT DEVIATION OF THIS MEASURMENT

1. 👍
2. 👎

Similar Questions

1. science

the current atomic model would be revised if 1)better microscopes were being used to study its structure. 2)better microscopes are invented in the future. 3)new information about an atoms structure is discovered.*** 4) a new

2. Chemestry

A new element has been discovered and you are on the task force to determine where this new element will be placed on the periodic table with its known properties. Using the model of the periodic table and its periodic patterns,

3. Science Chemical Reactions

1. The current atomic model would be revised if (1 point) A• better microscopes were being used to study its structure. B• better microscopes are invented in the future. C• new information about an atom’s structure is

4. Science Help!

Atomic theory is A. Subject to change if new information is discovered B. A solution to the problem of differing isotopes C. Unchangeable D. A descriptive table that lists all of the elements Is the answer A? Thank you

1. Chemistry

Which of the following are key parts of Dalton's Atomic Theory (Click the 4 that apply)? (1 point) All elements are composed of tiny indivisible particles called atoms*** Atoms of the same element are identical. The atoms of any

2. physical science

Before 1937, all naturally occurring elements had been discovered, but no one had found any trace of element 43. Chemists were still able to predict the chemical properties of this element (now called technetium), which is widely

3. Chemistry

Element X has two natural isotopes:X-6 (6.015amu) and X-7 (7.016amu). calculate the atomic mass of element X given the abundance of X-7 is 92.5%. a)12.5amu b)6.50amu c)6.09amu d)6.52amu e)6.94amu

4. Chemistry

Which element has no stable isotopes? 1. (subscript)27 Co 2. (subscript)51 Sb 3. (subscript)90 Th 4. (subscript)82 Pb I believe it's either 2 or 3, but I can't decide which. I'm not sure how to go about answering this question,

1. Chemistry

Which of the following statements about isotopes is/are true? a. Because isotopes have different numbers of neutrons, they have different mass numbers. b. because neutrons determine an atom's chemical properties, isotopes of the

2. Periodic Table

1. The atomic mass of an element is A. the sum of the protons and neutrons in one atom of the element.** B. twice the number of protons in one atom of the element. C. a ration based on the mass of a carbon-12 atom D. a weighted

3. Science--Help.

Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon

4. Algebra

Question : Determine whether each of the following given sets is a group with respect to the indicated operation. Show your work. (b) The set E of all even integers with operation addition. My work : So I was working on above part