An atom with 7 neutrons, 6 protons, and 6 electrons is considered an isotope of carbon, denoted as carbon-13. Carbon-13 is considered stable and inert because it has a full valence shell, making it less likely to participate in chemical reactions.
The lowest melting metal in group 1 (with 1 valence electron) is Francium (300 K, though not accurate). However it is not a liquid at room (or standard-) temperature. It is very reactive, but there are no stable isotopes (longest halftime 4 minutes for the most common found)
They are both from the same group, yes. But F is above Cl so it means that the F's valence shell is nearer the nucleus (or at "lower level") than the valence shell in Cl, which causes F to have more effective nuclear charge. This fact explains the more electron affinity* in F in relation to Cl and therefore F is more reactive. * - electron affinity refers to a free atom. electronegativity refers to an atom in a molecule.
Elements are categorized as active or inert based on their reactivity. Active elements, such as alkali metals and halogens, readily form chemical bonds and react with other substances. In contrast, inert elements, primarily the noble gases like helium and neon, have full valence electron shells, making them generally unreactive and stable. This distinction is crucial in understanding chemical behavior and interactions.
A BL Lac object is a term used in astronomy for a type of active galaxy with an active galactic nucleus.
Alkali metals, such as sodium and potassium, are characterized by having a single valence electron and very reactive atoms. They readily lose this outer electron to form +1 cations in chemical reactions.
You can determine the reactivity of a metal by looking at it's valence electrons. For example if the atom has one electron in it's valence shell it is more reactive because it wants to get rid of it and have a full valence shell.
There is only one electron in the outer most electron shell. With the lighter (less massive) alkali metals, there are less electron shells, between the outer most electron and the nucleus. Since the nucleus is positive(Protons) it more strongly holds the outer most electron. However, when going down the Alkali (Group 1) metals there are more electron shells, so the outer most electron is further away from the nucleus, and thereby less strongly held. This is evidenced by Lithium (The least massive) which only slowly effervesces in water. At the bottom of the group Francium ( The most massive) is explosive in water. NB Francium is not used in the open laboratory because it is also radio-active.
This question is meaningless without more information. What is meant by 'active'? If you mean reactive, then they are similar, both being alkali metals with 1 valence electron.
The alkali metals, group one on the periodic table. Starts with Lithium (Li) and ends with Francium (Fr). Or at least until Ununnunium is discovered, as it will be thenext alkali metal. The reason for their high reactivity is that they have only one valence electron. Valence electrons are the electrons that are involved in forming bonds with other elements. With only one valence electron, the atomic radius (how far away from the nucleus electrons can travel) is at its largest, making it so much easier for the electron to be taken by an other element that needs one valence electron, such as Chlorine (Cl). The reason that it is hard to find pure Sodium (Na) in nature is because it is an alkali metal, and therefore tends to bond with other elements rather than be alone.
I believe because they are less reactive but more stable so it evens out and it makes it so the the less reactive it is the more stable and a better chance for that electron configuration to become more stable and less reactive so that it can build on to something bigger and better.
The alkali metals (lithium, sodium, potassium, rubidium, caesium, and francium) all have a single valence electron and tend to be very reactive. Note that hydrogen also has a single valence electron and is very reactive but it does not become metallic except at very, very, very low temperatures.or very, very, very high pressures (at least theory predicts it would be).
The three major sub-atomic particles are : - PROTONS, ELECTRONS and NEUTRONS. Protons are positively charged (+) and found in the nucleus of an atom. Electrons are negatively charged (-) and found around (not IN) the nucleus of an atom. Neutrons have no charge (o) and are found in the nucleus of an atom . The number of protons ( and electrons) is the ATOMIC NUMBER, and the atoms position in the Periodic Table . The number of protons equals the number of electrons ( in order to keep the charges balanced). The Sum total of the protons and neutrons is the ATOMIC MASS/WEIGHT. The number of neutrons can vary This gives a different atomic mass for a given element and are known as ISOTOPES. Taking hydrogen as an example It has three isotopes. [1/1]H (Protium) ; 1 proton . ZERO(NO) neutrons, 1 electron. [2/1]H (deuterium); 1 proton , 1 neutron , 1 electron [3/1]H (tritium); 1 proton, 2 neutrons, 1 electron . (This isotope is radio-active) [1/1] protium is the most common isotope of hydrogen , and what is normally thought of as hydrogen. [2/1] deuterium is sometimes named as 'heavy hydrogen'. It is not a very common isotope. [3/1] tritium is sometimes named as 'super-heavy hydrogen'. It is a rare isotope ,and because of its radio-activity only found in labs. However, as mentioned above for all isotopes the protons and neutrons are in the nucleus of the atom, and collectively they are named as 'nucleons'. The electrons are found outside the nucleus. These 'rules' apply to all elements.
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.
An atom with 7 neutrons, 6 protons, and 6 electrons is considered an isotope of carbon, denoted as carbon-13. Carbon-13 is considered stable and inert because it has a full valence shell, making it less likely to participate in chemical reactions.
The lowest melting metal in group 1 (with 1 valence electron) is Francium (300 K, though not accurate). However it is not a liquid at room (or standard-) temperature. It is very reactive, but there are no stable isotopes (longest halftime 4 minutes for the most common found)
The electron transport chain is a form of active transport. It is a series of protein complexes that actively transport electrons across the inner mitochondrial membrane, resulting in the generation of ATP from ADP and inorganic phosphate.