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Isotopes
Isotopes are atoms that have different number of neutrons, so they have a different mass number than the other atoms in an element.
1,075 Questions
How many isotopes does hydrogen have?
7. the first one is 1H, regular old hydrogen.
The second one is 2H, aka deuterium.
The third one is 3H, aka tritium. none is radioactive except 3H. now for the artificial ones.
The fourth one is 4H, It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei. The fifth one is 5H, The nucleus consists of a proton and four neutrons. It has been synthesised in the laboratory by bombarding tritium with fast-moving tritium nuclei.
The sixth one is 6H, it decays through triple neutron emission and has a half-life of 3×10−22 seconds. The seventh and final one is 7H. It consists of a proton and six neutrons. It was first synthesised in 2003 by a group of Russian, Japanese and French scientists at RIKEN's RI Beam Science Laboratory by bombarding hydrogen with 8He atoms. In the resulting reaction, the helium-8's neutrons were donated to the hydrogen's nucleus. Hydrogen-4, -5, -6, and -7 are all radioactive.
How many Isotopes does Zinc Have?
Zinc has 5 stable isotopes (64, 66, 67, 68, and 70), all of which are neutral atoms at standard temperature and pressure. Zinc has many more isotopes that are radioactive, but these too are usually neutral atoms.
What are different sacramentals?
the anointing in baptism, the prayers used in last anointing , the nuptial blessing given in marriage, the sign of the cross, holy water, the rosary, the way of the cross and benediction of the blessed Sacrament.
Isotopes can have the same what?
Isotopes of an element have the same numbers of protons in the nucleus (and corresponding electrons). It's not so much "can have", as "do have". It's just a different number of neutrons that makes a different isotope.
Any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights.
Isotopes are identified based on their mass number, which is the sum of the number of protons and neutrons in the nucleus of an atom. This information can be obtained through techniques such as mass spectrometry or by analyzing the atomic mass of an element, which is a weighted average of the masses of its isotopes.
Are uranium isotopes chemically different?
No. All Uranium isotopes are called Uranium because they have 92 protons. The different isotopes (233, 235, 238, etc) all have 92 protons but have different numbers of neutrons in the nucleus. The chemical characteristics of an atom are determined by the number of protons in the nucleus which controls the number of electrons it takes to balance the atom and thus the chemical valence of the atom.
When you get down to it, that is the reason why enrichment of Uranium is such a difficult task since there is only a three neutron difference in weight between fissionable U235 and non-fissionable U238 and no difference in chemical properties.
After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
Can you have 2 fax machines on the same number?
No. They will interfere with each other and one of them is redundant anyways. why would you need 2 different machines on one number? you can only receive one fax at a time anyways
AnswerWell, there is Internet faxing service. This one allows you to send and receive numerous faxes. You can even broadcast your fax documents to a group. It does not require a phone line so you can fax anytime you want.
What is meant by hot and cold radio-isotope labeling with reference to DNA sequencing?
Hot labeling involves incorporating a radioactive isotope into DNA during sequencing, offering high sensitivity but potential hazards. Cold labeling uses non-radioactive isotopes, like fluorescent dyes, for safer detection. Both methods aid in tracking DNA fragments during sequencing.
How are mouthwashes different from gargles?
Not a lot at all. Most mouthwashes can be used as gargles as most have a disinfectant or antibacterial solution, But some gargles are medicated and meant just to be gargled and not to be used as a mouthwash. I would say that Listerine would be both a mouthwash and a gargle, but Hydrogen peroxide (H2O2) would be a gargle only.
Is a radioactive isotope good or bad?
It depends what you want to use it for. They are extremely dangerous and can kill you if exposed to the wrong kind, but they are also how much of the world's electricity is produced. Radioactive isotopes are also commonly used in medicine for a number of beneficial purposes. Radioactive isotopes are also what nuclear bombs use. Like most things in the world, they can be used for great good, and terrible harm... it just depends on what you do with it.
a Baylor RN is a registered nurse that works every weekend, usually 12 hours each day and gets paid a full time salary.
==new answer== They are naturally connecting readily with their subconscious mind, even if they don't remember having learned how. It is a person's subconscious mind that makes all the connections through the universal subconscious mind. It is in this way that those brilliant ideas are received. It is also how a mother knows when one of her's needs attention even if they are far away. Two or more people can receive the same impression at the same time even though they may be on different continents. It works the same way when you have , on occasion, answered a knock at your door knowing who it was before you opened it, or knew who was calling before you got to the phone. Anyone can, through concentration exercises and meditation, open themselves up to more of these types of experiences. It was through understanding more about mind that gave me a way to understand how prayer works. To develop a better relationship with your subconscious mind, you can increase your level of genius. Again, these are not gifts, they are earned. The proper relationship between conscious and subconscious mind is the "marriage made in heaven" that is referred to in the scriptures. The conscious mind adds further understandings through experience and the subconscious mind stores these additions and provides a way for your thoughts to manifest. A genius knows how to use undivided attention while most other people are busy multi-tasking, thinking that is good? That is the key difference. They know how to focus all their attention on one thing at a time. They may have learned this in a previous incarnation. My dad had total recall and couldn't understand why everyone else didn't know how. I had to get deep into my studies of mind to discover this. We all know a lot that we don't remember having learned.
Someday
What is an etchant for tungsten?
An etchant commonly used for tungsten is a mixture of hydrofluoric acid and nitric acid. This solution is effective in selectively etching tungsten while leaving other materials unaffected. Precautions should be taken when handling these acids due to their corrosive nature.
RN stands for Registered Nurse
In the United States, a registered nurse has AT LEAST two years of nursing education behind them and they may even have a master's or PhD in nursing. They are licensed by an independent board and must pass a difficult test required a large range of knowledge about the human body, illnesses, symptoms, correct responses and drug interactions among other things. They have the widest scope of any nursing profession and can even open their own practices and practice some forms of medicine without working for a physician. When a doctor decides that you need some form of treatment it is almost always a nurse who will do the actual treating and monitoring to be sure that it is working and there are no complications. They give the shots, check the blood pressure, and generally are the ones out on the front lines making medicine happen. (This is not meant as a slight to doctors who are experts in their own right and also work very hard.) There is a nurse shortage in the U.S. so if you are interested in nursing, we NEED you. Registered Nurse
Which isotope of hydrogen is used commonly as a trace in organic chemistry?
Deuterium .
Deuterium is an istope of hydrogen because it contains 1 proton, 1 neutron and one electron.
The commonest isotope is protium , which contains 1 proton and one electrons, and NO neutrons.
Deuterium has the atomic mass of '2'. Symbollically it is shown as [2/1]H .
It has the ato,mic mass of '2' because the nucleus contains 1 proton and 1 neutron ; 1 + 1 = 2
Because of this extra 'maSS' it is sensitive to nmr . (nuclear magnetic resosnsnce), and hence it can be 'seen' on nmr spectra.
How isotopes can have different masses and still be the same element?
For the same element the number of protons and electrons remains unaltered.
Howerm for that same element the number of neutrons can vary., leading to different atomic masses.
Taking hydrogen as an example. It has three isotopes.
#1 ; protium ; 1 proton , 0 neutrons (Atomic Mass ; 1 + 0 = 1 )
#2 ; deuterium ; 1 proton , 1 neutron ( Atomic mass ; 1 + 1 = 2)
#3 ; tritium ; 1 proton, 2 neutrons ( Atomic Mass ; 1 + 2 = 3)
Notice for each isotope of hydrogen there is only ONE proton. However, for each different isotope of hydrogen there is a different number of neutrons.
The Atomic Mass is the sum of the protons and neutrons).
#4 ; Helium(He) ; 2 protons, 2 neutrons ( atomic mass 2 + 2 = 4 ).
For comparison helium has 2(TWO) protons and 2 neutrons, but it is an entirely different element, because it has a different number of protons.
Are there 2 neutrons in the helium 4 isotope?
Yes. He-4 isotope has 2 protons, 2 electrons and 2 neutrons
What are short-lived isotopes?
Short-lived isotopes are isotopes with relatively short half-lives. Note that short-lived is a relative term, and that means you need to make some kind of comparison to use the term correctly. Let's look at one example using cobalt, which has only one stable isotope, cobalt-59.
We make cobalt-60 by lowering a fixed amount of cobalt-59 into an operating nuclear reactor. It will bathe in the neutron flux there to become activated (neutron activation). The cobalt-59 absorbs a neutron and has been activated to become cobalt-60, which is an unstable isotope of cobalt. That means it is radioactive, and it has a half-life of 5.2714 years. If we look at another isotope, cobalt-58, we find it has a half life of 7.86 days. It's a short-lived isotope of cobalt, compared to cobalt-60. Need another example? Then let's do one more.
In the case of rubidium, the isotope rubidium-85 is the only stable isotope of this metal. Rubidium-87, on the other hand, has a half-life of 4.88x1010 years, which is longer than the estimated age of the universe. (Wow!) The isotopes rubidium-83 and rubidium-84 have half-lives of 86.2 days and 32.9 days, respectively. These two isotopes are short-lived isotopes of rubidium, at least compared to the long-lived rubidium-87 isotope.
There are many isotopes of elements that have been synthesized in the nuclear physics labs, and a lot of them have half-lives of less than one second. The term short-lived isotope is a relative term, and it should be used with that idea in mind. The difference between the two (or more) compared isotopes can be smaller, as in the case of cobalt, or larger, as we showed in rubidium. That difference doesn't have to be specific either, so remember that as well.
We'll depart with the idea that the term "short-lived isotope" is often encountered in medical imaging. The short-lived isotopes referred to usually have half-lives of days or even hours, and are synthesized shortly before use (because they don't last long).
What is the meaninq of two isotopes stable and unstable isotopes?
Isotopes are atoms of the same element that have the same number of protons, but different numbers of neutrons, and therefore different masses. Unstable isotopes are radioactive and undergo radioactive decay of their nuclei, while stable isotopes do not undergo radioactive decay.
An isotope is identified by its atomic mass number which is the total number of?
protons and neutrons in the nucleus of an atom. Isotopes of an element have the same number of protons but different numbers of neutrons. The number of neutrons in an atom affects its stability and often determines its nuclear properties.
Which is an example of a highly unstable isotope that is often used in fission reactions?
Uranium-235 (U-235) is an example of a highly unstable isotope that is used in fission reactions. It undergoes spontaneous fission, releasing a large amount of energy and additional neutrons, which can then go on to induce fission in other uranium atoms, leading to a chain reaction.
Do isotopes have different electrical charges?
No, isotopes have the same electrical charge because they have the same number of protons in their atomic nuclei, which determines the electrical charge. Isotopes only differ in the number of neutrons, which do not have an electrical charge.
Where are isotopes located at?
Isotopes are located within the nucleus of an atom. They are variants of a particular chemical element, having the same number of protons but different numbers of neutrons. Isotopes can exist naturally or be artificially produced.
