Periodic Table

In cold temperatures, atoms move more slowly and their kinetic energy decreases, causing them to come closer together and form a solid if cold enough. This is because there is less thermal energy available to keep the atoms moving and apart from each other.

HgO has valency 2 .so,the roman numeral for HgO is:

HgO(II)

The periodic table of elements is divided into groups and periods. The groups (columns) are elements with similar chemical properties, while the periods (rows) represent the number of electron shells in an atom. The main subcategories include metals, nonmetals, and metalloids.

Every family is unique, and reactions can vary greatly based on individual circumstances. However, a family with a history of open communication, acceptance, and understanding may be less likely to react negatively.

Noble gasses are least reactive of all the elements. So the least reactive element in the period 4 is Krypton. It is a noble gas with an atomic number of 36.

Hydrogen will react with most elements because it has a tendency to donate its electron (oxidation) or accept an electron (reduction) to achieve a stable electron configuration. This reactivity allows hydrogen to form various compounds with other elements, creating a wide range of chemical reactions.

Bromine, group 17; Mercury, group 12. Both are liquids at STP

No group 18 element can react with fluorine under normal conditions, as they have a stable and inert configuration with full valence shells.

Non-matter in chemistry refers to anything that is not made up of atoms or molecules. This includes energy such as light, heat, or electricity, as well as phenomena like magnetic fields. While these entities play crucial roles in chemical reactions and processes, they do not have mass or occupy space like traditional matter.

The Element with the Chemical Symbol of Rb is Rubidium. Rubidium is a soft, silver-white metallic elements of the alkali metal group. (A#-37 and AM-85.4678)

The element represented is gadolinium (Gd). It has 54 electrons, with the electron configuration: [Xe] 6s2 4f7.

The Aufbau Principle is also known as the build-up principle because it describes the process of filling electrons into atomic orbitals starting with the lowest energy orbitals and moving towards higher energy levels. This gradual filling up of electron orbitals reflects the building up of an atom's electronic configuration.

The noble gases are the least reactive elements on the periodic table. They have a full outer electron shell, making them stable and unlikely to participate in chemical reactions.

Radium has no Latin name as it was unknown to the Romans. The name "Radium" is a synthetic Latin style name made up by its discover: Marie Curie.

Elements in groups 1 and 7 are highly reactive due to their tendency to gain or lose electrons to achieve a stable electron configuration. This reactivity makes them form compounds with other elements to become more stable. Group 1 elements readily lose an electron to form a +1 ion, while group 7 elements gain an electron to form a -1 ion, both of which allow them to bond with other elements to form compounds.

Silver will not be removed from the periodic table of elements as it is a naturally occurring element with atomic number 47. The periodic table is a comprehensive chart that organizes all known elements based on their properties and atomic structure.

1. Ununoctium is placed in the group 18 and period 7 of the periodic table of Mendeleev.

2. Ununoctium is a transactinoid chemical element.

The repeating pattern of elements and their properties in the periodic table is called periodicity. This refers to the predictable trends in properties such as atomic size, ionization energy, and electronegativity as you move across a period or down a group in the table.

The two tables were virtually identical. However, because he drafted his table earlier in 1869 and because his table included "blanks" for yet-to-be-discovered elements to fit, Mendeleev is given the major recognition for the organization of the elements.

Tungsten has the highest melting point of all metals at 3,422 degrees Celsius.

Because aluminum has 3 electrons in its valence shell and when you get to the 3rd ionization energy it has an empty valence shell with a configuration as the noble gas Neon. Aluminum wants to stay at this state and will take a lot of energy to loose another electron from next energy level.

The atomic number of the lightest element is 1, which corresponds to hydrogen.

The element with atomic number 34, selenium.

Mg, magnesium always is forming magnesium oxide as an outer shell, this is why when you sand it it often becomes more lustrous. Same goes for aluminium and iron forms rust when mixed with water however this is more gradual than an oxide layer, the iron hydroxide layer is clearly more visible. However, they all appear quite stable depending on what you mean by "least stable".

Group one elements are generally more reactive than group two elements. This is because group one elements have one electron in their outermost shell, making them more willing to react and form compounds in order to achieve a stable electron configuration. Group two elements have two electrons in their outermost shell, which makes them less reactive than group one elements.