Whole family.
Valency
The elements on the periodic table are arranged in periods and groups. The periods run across the table horizontally from left to right, whilst the groups run vertically from top to bottom. Elements from the same group tend to have similar chemical properties since they have the same number of electrons in their outer shells. :) You can find which elements are in which groups and more about the groups themselves by looking at a periodic table for the numbers above the columns or searching Google for "group 1" for example.
Elements in the same family of the periodic table have similar bonding properties because they have the same number of valence electrons. This results in similar chemical reactivity as they tend to gain, lose, or share electrons in a similar manner to achieve a stable electron configuration. The shared valence electron configuration leads to similarities in their bonding behavior.
The family of 'noble' (= inert) gasses in group (column) 18 of the periodic table. Their valence shell is completely filled up with s2 and p6 electrons.
Iodine is the element most similar to astatine. Both elements are in the halogen group on the periodic table, sharing similar chemical properties due to their valence electron configuration. Astatine is a rare and highly radioactive element, making it difficult to study in detail.
Every elements have the electrons of an atom distribution or a molecule in molecular orbitals and it is called electron configuration. The element that can be grouped in the family with above electron configuration is called antimony.
This electron configuration belongs to the group 17 elements, also known as the halogens. The 3s2 3p5 configuration specifically corresponds to the element chlorine (Cl).
An element can either gain or lose electrons to achieve a noble gas electron configuration. Such an electron configuration gives an atom of an element a full outer shell, thereby making that element's ion nonreactive. Metals tend to lose electrons, and become cations, whereas nonmetals tend to gain electrons, and become anions. The amount of electrons an element gains of loses is based on the group/family the element is found in on the Periodic Table.
Valency
The elements on the periodic table are arranged in periods and groups. The periods run across the table horizontally from left to right, whilst the groups run vertically from top to bottom. Elements from the same group tend to have similar chemical properties since they have the same number of electrons in their outer shells. :) You can find which elements are in which groups and more about the groups themselves by looking at a periodic table for the numbers above the columns or searching Google for "group 1" for example.
Elements in the same group or family share important chemical properties, such as valence electron configuration and reactivity. They typically have similar physical and chemical behaviors due to their similar electron configurations. This organization helps predict element properties and chemical reactions.
Elements in the same family of the periodic table have similar bonding properties because they have the same number of valence electrons. This results in similar chemical reactivity as they tend to gain, lose, or share electrons in a similar manner to achieve a stable electron configuration. The shared valence electron configuration leads to similarities in their bonding behavior.
Elements in group 17 need one electron to gain a stable electron configuration. Two atoms of the same element or two elements in this family forms compounds with a single covalent bond. Examples are chlorine, bromine or iodine chloride.
The family of 'noble' (= inert) gasses in group (column) 18 of the periodic table. Their valence shell is completely filled up with s2 and p6 electrons.
The valance electron configuration is the same in each at ns1 where n = the period number.
The family name of boron is the boron group, also known as group 13, on the periodic table. The elements in this group include boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). These elements share similar chemical properties due to their outer electron configuration, with boron being the first element in this group.
Actually the atomic number tells you how many protons there are. And there are 6 elements with 2 electrons. You can find out that out by looking at a periodic table and looking at family 2. Im guessing you won't be able to find the element your looking for unless you know the number of nuetrons or even better the number of protons.