On most periodic tables a single atomic mass is listed instead of the mass numbers for all the stable isotopes. How is this mass related to the different isotopes?

Answers

Answer 1

Answer:

Answer: The mass of the atom is basically the average atomic mass of all the stable isotopes.

Explanation:

Average atomic mass is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_(i=1)^n\text{(Atomic mass of an isotopes)}_i* \text{(Fractional abundance})_i$

For Example: Taking the element silicon

Three isotopes of Silicon, which are Si-28, Si-29 and Si-30.

Average atomic mass of silicon = 28.086 amu

As, the average atomic mass of silicon is closer to the mass of Si-28 isotope. This means that the relative abundance of this isotope is the highest as compared to the other two isotopes.

Percentage abundance of Si-28 isotope = 92.2%

Percentage abundance of Si-29 isotope = 4.7 %

Percentage abundance of Si-30 isotope = 3.1%

Hence, the mass of the atom is basically the average atomic mass of all the stable isotopes.

Answer 2

Answer: Since atoms of the same element can vary in number of neutrons, isotopes of elements exist. Since neutrons have mass more or less of them in an atom affects its mass. Mass number is the average mass of the isotopes of an element with respect to the relative abundance of each isotope.

Related Questions

Answer please thank you
What can you conclude about the figure
In the atmosphere water vapor condenses to form clouds. Please select the best answer from the choices provided T F
The noble gases are the least what of any elements on the periodic table
A student has the following equipment - copper wire, nail made of iron,a battery, paperclips.How can he make an electromagnet and use it to separate a mixture of small pieces of copper and iron? please help

What is the relationship between thermal energy and conduction convection and radiation

Answers

the higher the thermal energy the faster the conduction convection and radiation take place as the particles have more kinetic (movement) energy

When the compound Na2S forms what happens to the Na and S ions

Answers

nothing, ATOMS lose or gain electrons to become IONS
Two Na ATOMS lose 1 electron each and 1 S ATOM gains 2 electrons

Since sodium ions each have a single positive charge (lacking one electron in its valence orbital) and sulfur ions each have a 2- charge (having two extra electrons in its valence orbital), the compound Na2S forms when two sodium ions are ironically bound to a central sulfur.

What is electronegativity?An atom's ability to attract other electrons and form a chemical bond
A type of electricity only found in some atoms
The total number of electrons in an atom
so
A property of electrons that give them a negative charge

Answers

Answer: An atom's ability to attract other electrons and form a chemical bond

Explanation:

The electronegativity of an atom tells of its power to attract electrons. Electronegativity values of elements ranges from 0 to 4.0, a high value means higher ability to attract electrons while a lower value means lower ability to attract electrons. Also, a wider difference in electronegativity between two atoms gives an ionic bond unlike a covalent bond with narrow difference.

Thus, nonmetals like chlorine higher electronegativities than metals like potassium.

Answer:

An atom's ability to attract other electrons and form a chemical bond

Explanation:

I took the test and got the answer right

Example of natural frequency

Answers

Natural frequency is a frequency when an object hits a s surface and causes ripples or vibrations or disturbance of their nearby source. An example is throwing a stone to water. When you throw a stone, it creates a wave around the fallen stone. The water is being disturbed by the stone and creates a wave. This is a natural frequency.

How do prices help determine for whom goods will be produced in a market economy

Answers

I tried dude, but someone got rid of my helpful resource...

Force and Motion: Force changes _________.

Answers

net force, i think could be a possible answer

speed I'm pretty sure

Other Questions

Termometer X menunjukkan skala -10°x ,ketika dicelupkan ke dalam air es dan menunjukkan skala 90°x ketika dicelupan ke dalam air mendidih. Suhu 50°x itu sesuai dengandenganA. 40°C B. 60°C C. 60°C D 70°C E. 80°C

Which phase change in the Atmosphere forms clouds?.

What effect does solar radiation have on climate when comparing the equator to polar- regions?

There are 2 questions :)How did warm, moist air turn into a cloud? Explain the specific conditions in the area that lead to that specific type of precipitation?