Quick Answer: When An Atom Is Stable What Will Be True?

How do you know if an atom is stable?

The stability of atoms depends on whether or not their outer-most shell is filled with electrons.

If the outer shell is filled, the atom is stable.

Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability..

Why do atoms need to be stable?

All atoms are eager to become octet-in which the total number of the electrons in the outermost shell is equal to eight (since 8 is the total no. of electrons the last shell can carry) and it cannot accept electrons anymore so it becomes stable. … That’s why they want to be stable and complete their vacancies.

Why is it called radioactive?

Marie and Pierre Curie’s study of radioactivity is an important factor in science and medicine. After their research on Becquerel’s rays led them to the discovery of both radium and polonium, they coined the term “radioactivity”.

Why do atoms want 8 electrons?

Row 3 elements on the left lose electrons to gain a full outer shell, elements on the right usually gain electrons to have 8 electrons in their outer shell. The basis of the octet rule is that atoms ‘want’ a full outer shell of electrons, i.e. they are most stable with a full outer shell.

What does it mean when an atom is stable?

An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom’s nucleus may result from an excess of either neutrons or protons.

Is chlorine highly reactive?

Halogens are notorious electron-hogs; powerfully attracting electrons from atoms of other elements, particularly from the alkali metals. This makes the halogens highly reactive. Chlorine, being one of the smaller halogens, will react strongly with most elements.

Is radioactive decay truly random?

Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). … This is a random process, i.e. it is impossible to predict the decay of individual atoms.

How do things become radioactive?

Naturally, atoms become radioactive by fusion in a Sun or by absorbing neutrons there. As an object on Earth, we can place the object in a nuclear fission reactor where it will absorb neutrons and become radioactive. … When any element has absorbed enough neutrons, it will become radioactive.

Why do atoms want octets?

A complete octet is very stable because all orbitals will be full. Atoms with greater stability have less energy, so a reaction that increases the stability of the atoms will release energy in the form of heat or light. A stable arrangement is attended when the atom is surrounded by eight electrons.

Why do atoms bond together?

Atoms form chemical bonds to make their outer electron shells more stable. … An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons.

What are exceptions to the octet rule?

However, there are three general exceptions to the octet rule: Molecules, such as NO, with an odd number of electrons; Molecules in which one or more atoms possess more than eight electrons, such as SF6; and. Molecules such as BCl3, in which one or more atoms possess less than eight electrons.

What atoms are most stable?

Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. Sodium atoms have 11 electrons.

Can chlorine show effects?

Chlorine when attached to benzene ring shows the inductive electron-withdrawing effect dueto sigma bonding with the carbon atom of benzene ring and the resonance electron-donating effect.

Does it make sense that a chlorine atom would accept two electrons?

Does it make sense that a chlorine atom would accept two electrons? They’re most stable (and thus most happy) with a full outer shell. Sodium, chlorine, and oxygen atoms all want outer shells to have 8 electrons. Hydrogen doesn’t have enough shells to require 8, so it’s happy with just 2.

Why is iron the most stable element?

This stability is caused by the attractive nuclear force between nucleons. Iron 56 is the most stable nucleus. It is most efficiently bound and has the lowest average mass per nucleon. … It takes more energy per nucleon to take one of these nuclei completely apart than it takes for any other nucleus.

Why even even nuclei are more stable?

The greater number of stable nuclei with even numbers of protons and neutrons is explained in terms of the energy stabilization gained by combination of like nucleons to form pairs, i.e. protons with protons and neutrons with neutrons, but not protons with neutrons.

How does nuclear radiation harm the body?

Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as skin burns and acute radiation syndrome (“radiation sickness”). It can also result in long-term health effects such as cancer and cardiovascular disease.

Which is more stable atom or ion?

Atoms are neutral therefore we can say that they are stable. In the case of electronic configuration of ions, they are more stable than atoms.

Is the chlorine atom stable?

A chlorine atom is not stable. Chlorine has 7 electrons in its outer shell and needs 8 electrons for it to be full, thus it is not stable.

How can you tell if an isotope is unstable?

An unstable isotope emits some kind of radiation, that is it is radioactive. A stable isotope is one that does not emit radiation, or, if it does its half-life is too long to have been measured. It is believed that the stability of the nucleus of an isotope is determined by the ratio of neutrons to protons.

Why is the octet rule important?

The octet rule is important in covalent bonding because sharing electrons gives both atoms a full valence shell. All atoms strive to achieve a full valence shell, just like the noble gases. This is the most stable electron arrangement. … Thus, each atom has eight valence electrons, a stable noble gas configuration.