Do isotopes have same stability?

Only 90 isotopes are expected to be perfectly stable, and an additional 162 are energetically unstable, but have never been observed to decay. Thus, 252 isotopes (nuclides) are stable by definition (including tantalum-180m, for which no decay has yet been observed).

Do isotopes have the same nuclear properties?

Isotopes have identical chemical properties, yet have very different nuclear properties. For example, there are three isotopes of hydrogen. Two of these isotopes are stable, (not radioactive), but tritium (one proton and two neutrons) is unstable.

Do all elements have stable isotopes?

Isotope Facts All elements have isotopes. There are two main types of isotopes: stable and unstable (radioactive). There are 254 known stable isotopes. All artificial (lab-made) isotopes are unstable and therefore radioactive; scientists call them radioisotopes.

Do all isotopes of an element have the same atomic number?

Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

How do isotopes of a given element differ How are they similar?

Isotopes of any given element all contain the same number of protons, so they have the same atomic number (for example, the atomic number of helium is always 2). Isotopes of a given element contain different numbers of neutrons, therefore, different isotopes have different mass numbers.

In what way are isotopes of a given element always different?

In what way are isotopes of a given element always different? In what way(s) are they always the same? They always have different masses due to different numbers of neutrons. They always have the same number of protons (which determines the identity).

How do isotopes of a given element differ select all that apply?

Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words, isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.

Do all isotopes of an element have the same atomic number give at least one example?

No- if they have the same mass number & different atomic numbers they are atoms of different elements. 17.

Why are isotopes of a given element always different?

Do isotopes of all other elements also have the same value for the mass number and atomic mass?

An element’s mass number (A) is the sum of the number of protons and the number of neutrons. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.

How many stable isotopes are there?

There are 254 known stable isotopes. All artificial (lab-made) isotopes are unstable and therefore radioactive; scientists call them radioisotopes. Some elements can only exist in an unstable form (for example, uranium).

What is the difference between elements and isotopes?

Elements have families as well, known as isotopes. Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s atomic number on the Periodic Table.

What does nuclear stability mean in chemistry?

Nuclear stability refers to the tendency of a nucleus of an atom to decay, which means to change into something else. If the isotope of an element (called a nuclide) is unstable (not stable), the nuclide has the tendency of emitting some kind of radiation, and is called radioactive.

What is the number of protons and neutrons in a stable nucleus?

The number of protons is thus reduced from 8 to 7 (number of neutrons is increased from 7 to 8), so that the resulting nucleus is an isotope of nitrogen, 15 N, which is stable. On the other hand nuclei, such as 19 O, which have excess of neutrons, decay by negative beta decay, emitting a negative electron and an antineutrino.