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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

Which member of group 7 that exists as 2 isotopes?

Bromine is the member of group 7 that exists as two stable isotopes: bromine-79 and bromine-81. These isotopes have slightly different atomic masses due to variations in the number of neutrons.

How much does 1 gram of isotope copper cost?

The cost of 1 gram of isotopic copper can vary based on the isotopic composition and market conditions. Generally, isotopic copper can be much more expensive than regular copper due to the specialized production processes involved in isolating specific isotopes. Prices can range from hundreds to thousands of dollars per gram.

What fraction of the parent isotope will be left after 30 minutes?

It depends on the half life of the isotope. If the half life is, for example, 10 minutes, then 1/8 of the parent isotope will remain (30/10 = 3; 1/2^3 = 1/8).

Essentially, to work out the remaining fraction, you firstly divide the period of time by the half life (the answer in this case is X), and then do 1/2 to the power of x.

What isotope defines the atomic mass unit?

Carbon-12 isotope is used to define the atomic mass unit, which is equal to 1/12th of the mass of a carbon-12 atom.

How is an isotope and mass number related?

It isn't, as such. Isotopes of the same element have different numbers of neutrons, and neutrons have a mas of one atomic mass unit (amu). So isotopes have different atomic masses, but being told the number of neutrons any isotope has, will not enable you to say what element or atomic mass it had, unless you remembered the details for every single isotope. Even then different elements can have the same number of neutrons. Isotopes do get named after their atomic mass however - uranaium 235 has an atomic mass of 235, for instance.

What is the oldest carbon-14 dated seed that was ever germinated and grown?

The oldest carbon-14 dated seed that has been germinated and grown is around 32,000 years old. The seed was from a fossil fruit found in northeastern Siberia and was successfully grown into a healthy plant in a laboratory setting. This discovery provides insights into ancient plant species and their ability to survive long periods of dormancy.

Which two measurements are made for each isotope?

If you're talking about mass spectrometry, the measurements made for each isotope during the detection process are abundance and mass to charge ratio.

Which isotope of argon must be most common?

40 Ar, because of its weight its very close to 40g/mol

What is an example of isotope at your house?

An example of an isotope in my house would be carbon-14, which is used in carbon dating to determine the age of organic materials.

How can isotopes be used in boron?

Isotopes of boron, such as boron-10 and boron-11, can be used in various applications. Boron-10 is used in boron neutron capture therapy for cancer treatment, as it has a high propensity for capturing thermal neutrons. Boron-11 is used in nuclear reactors and as a dopant in semiconductors for electronic devices.

Are there important isotopes in Krypton?

Yes, there are several important isotopes of Krypton. Krypton-85 is used in dating old groundwater, while Krypton-81 is used for monitoring the Earth's atmosphere. Krypton-86 is the most abundant stable isotope and is used in various applications, such as in lighting and advertising signs.

What are the most common forms of polonium when used by humans?

Polonium-210 is the most common form of polonium used by humans. It is mainly used in industrial applications like anti-static devices, nuclear weapons, and nuclear batteries due to its high radioactivity. However, it is highly toxic and poses a significant health risk if not handled properly.

How do you calculate subatomic particles in isotopes?

To calculate the number of subatomic particles in isotopes, you need to know the atomic number (number of protons) and mass number (sum of protons and neutrons) of the isotope. Subtract the atomic number from the mass number to find the number of neutrons. The number of electrons will be equal to the number of protons if the atom is neutral.

What nuclei are fused in the nuclear reaction of a hydrogen bomb?

In a hydrogen bomb, hydrogen isotopes such as deuterium (2H) and tritium (3H) are fused together to form helium. The main reaction involves the fusion of deuterium and tritium nuclei to create a helium nucleus, along with a neutron and release of a large amount of energy.

How are isotopes shown?

Isotope can be referred to as the different versions of the SAME ELEMENT. Such as Chlorine has isotopes of Chlorine - 35 and Chlorine - 37. This will just cause the difference in mass numbers because of the difference in neutrons. Chlorine -35 has 17 protons, 17 electrons and 18 neutrons making it to have a mass number of 35 and Chlorine - 37 has 17 protons, 17 electrons and 19 neutrons making it to have a mass number of 39. Some isotopes can be used in normal chemical reactions but some cannot.

What is the half-life of the radioactive isotope 6-C-14 element carbon?

The half-life of the radioactive isotope Carbon-14 (C-14) is approximately 5,730 years. This means that it takes 5,730 years for half of the C-14 in a sample to decay into nitrogen-14. This property is used in carbon dating to determine the age of organic materials.

Is an isotope a positively charged particle?

No. An element is a type of atom; distinguished by the number of protons; an isotope might be considered a "sub-type", distinguished by the number of neutrons. In other words, different isotopes of the same element have the same number of protons, but the number of neutrons varies. This is completely unrelated to the electric charge.

Can isotopes be radioactive or non-radioactive?

No not all isotopes are radioactive, However there certainly are several elements which have no stable isotopes.

these are the man made elements also known as "Not found in nature". such as:

Tc - Technetium (43)

Pm - Promethium (61)

Np - Neptunium (93)

Pu - Plutonium (94)

Am - Americum (95)

Cm - Curium (96)

Bk - Berkelium (97)

Cf - Californium (98)

Es - Einsteinium (99)

Fm - Fermium (100)
No.
No, not all isotopes are radioactive. Only atoms that are unstable (carbon-14, etc.) are radioactive

How are strontium isotopes similar?

Strontium isotopes have the same number of protons in the nucleus, which determines its chemical properties. They differ in the number of neutrons, leading to different atomic weights and radioactive properties. Isotopes of strontium can be used for dating rocks or studying environmental processes.

Are superheavy elements stable?

Superheavy elements are typically unstable due to their high number of protons, which leads to greater electromagnetic repulsion between the nucleus's positively charged protons. This instability causes these elements to decay quickly through alpha decay, beta decay, or spontaneous fission. Scientists continue to research and synthesize superheavy elements in laboratories to study their properties and behavior.

If technetium 99 emits a gamma ray what is the product?

Radium 226 has decays by Alpha emmision to produce Radon-222. Sometimes a gamma ray is emmited at the same time and lower energy alpha is emitted the product is same in both cases. Gamma emmision by itself causes no change to the atom the nucleus just ends up with a lower energy.

How many neutrons are in an isotope of lithium if it has an atomic mass of ten?

An isotope of lithium with an atomic mass of ten would have an atomic number of 3, meaning it has 3 protons. To find the number of neutrons, subtract the atomic number from the atomic mass: 10 (atomic mass) - 3 (atomic number) = 7 neutrons. Therefore, an isotope of lithium with an atomic mass of ten would have 7 neutrons.

Are ions and isotopes charged?

Not necessarily no, not strictly speaking, but it can be. An Ion is a charged particle. As an example SO42- is an ion. It is not a charged atom. It is a charged species formed from 5 atoms.

A lone proton (H+ ) is a charged atom of hydrogen after it has been stripped of one electron.

Cl- is an ion and in this case yes - it is a charged atom.