How do we know isotopes exist?
Solved
Show answers
More tips
- F Family and Home How to Teach Your Child to Read?...
- C Computers and Internet How to Download Videos from YouTube? Simple Steps to Download Any Content...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
- H Health and Medicine How to perform artificial respiration?...
- C Computers and Internet How to Get Rid of Windows Genuine Check?...
- F Food and Cooking The Disease That Haunted Abraham Lincoln...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- S Style and Beauty How are artificial nails removed?...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
Answers on questions: Chemistry
- C Chemistry Write the name and formulas of the products that would form when hydrochloric acid, hcl, and sodium hydroxide, naoh, react....
- C Chemistry Which statements best describe fossils? Check all that apply. They only show evidence of living species. They are the preserved remains or evidence of organisms....
- C Chemistry In Section 5.6, we learned that triple bonds are stronger and shorter than single bonds. For example, a C−CC−C single bond has an average bond energy of 347 kJ/molekJ/mole,...
- C Chemistry Water can be formed in the following reaction: 2h2 + o2 — 2h2o. if you have 12 moles of hydrogen gas (h2), how many moles of oxygen gas (o2) will you need to make...
- C Chemistry Ineed . give me an explanation. you so much....
- C Chemistry Why are electromagnetic waves used instead of sound waves?...
- C Chemistry The number of is different for each element and is known as the number,...
- A Arts Its sof.u.c.king funny when the people who hurt you wanna start talking again...
- M Mathematics Simplify the expression to polynomial in standard form(3x-2)(x+2)(3x+2)...
- M Mathematics I need help asap! i don’t understand:/...
Ответ:
The atomic mass of an atom is the sum of protons and neutrons. Given these are integer numbers the atomic mass of an atom is also an integer number. Then why there are so many elements whos atomic mass is not a whole number?
Because the atomic mass of an element is the wieghted average of the masses of the different atoms, so the fact that you obtain a decimal number is because there are atoms with one weight and atoms with different weight. Given that an elements is identified by the number of protons (all the atoms of a given element have the same number of protons) the only possible difference is in the number of neutrons. An these are isotopes: atoms of the same element (same number of protons) with different number of neutrons.
Ответ: