Periodic Table

The 15th group of elements in the periodic table is known as the Pnictogens or Nitrogen family. It includes nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). These elements share similar chemical properties, particularly in their ability to form compounds with five valence electrons.

[Xe] 4f10, 5d10, 6s2, 6p3

where[Xe] is1s2, 2s2, 2p6, 3s2, 3p6,4s2, 3d10, 4p6,5s2, 4d10, 5p6

note that the s orbitals are filled before the d orbitals to allow for maximum stability of the atom. Electrons will tend to fill orbitals of a lower energy level than those of higher energy levels

The dark jagged edge line separates the metalloids (or semi-metals) from the metals and nonmetals on the periodic table. Metalloids are elements that have properties of both metals and nonmetals, such as silicon, germanium, and arsenic.

You think probable to the first group of elements - alkali metals.

The nonmetals consist of Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb) and Tellurium (Te).

At 25 degrees Celsius (room temp) all of these are in a solid state.

It is important to remember though, that gases can also be considered non metals, though because, obviously, they are not metals.

The three main classifications of elements on the periodic table are metals, nonmetals, and metalloids. Metals are typically shiny, good conductors of heat and electricity, and malleable. Nonmetals are usually dull in appearance, poor conductors of heat and electricity, and brittle. Metalloids have properties that are intermediate between metals and nonmetals.

Malleability generally decreases across a period from left to right on the periodic table due to increasing atomic number and a decrease in metallic bonding. Down a group, malleability tends to increase due to the addition of new energy levels and increased atomic size.

"Yb: Powering possibilities with rare earth strength."

The organizational tool used by scientists to order the elements by atomic number and similar properties is called the periodic table. It is a grid that arranges elements in rows and columns based on their atomic structure, allowing for easy comparison of elements with similar characteristics.

Noble gases have a full set of electrons in their outermost energy level. These elements are stable and unlikely to form chemical bonds with other elements due to their complete electron configuration.

All the elements between Hydrogen and Uranium, inclusive, except elements 43 and 61: Tc (Technetium) and Pm (Promethium) and even these tow have now been found in nature,

Silver and gold can be found in their elemental state as can Nitrogen, Oxygen, the inert gases etc.

Elements that have their atomic weights in parentheses are unstable and radioactive, some of these will decay in less than a second. The atomic mass in the parentheses is the most stable isotope of the element.

'Ra' stands for Radium in the periodic table. It is a radioactive element with atomic number 88.

There are about 1073 particles in the universe, and this is Eddington's number.

Nowadays, one should account for the dark matter as well, but that inclusion will only move the above number by less that two orders of magnitude.

There is no commonly known term or definition for "exnon." It may be a misspelling or a specific term that is not widely recognized. Can you provide more context or clarify the term so I can assist you better?

At is the chemical symbol of astatine.

At is a radioactive halogen that is itself the byproduct of the decay of more massive radioactive atoms. It has a very short half life, and the "world supply" of astatine (the amount believed to exist at any particular moment anywhere in the entire mass of the planet) is about one ounce (approx. 30 grams).

Certainly! I suggest lifting the table together with someone to prevent injury. Make sure to clear the path for easy movement and communicate effectively to coordinate your actions.

You cant make heavy water in a normal home or lab you need to have very specilized equpiment for example huge electromagnets nuetron guns which is probably worth over $100,000 , take the easy option and buy it froma chemical supplier for example Sigma Aldrich

Multiple stage cascade electrolytic isotope enrichment. However the electricity cost to power the cascade will be much higher than the cost of equipment, unless you build right next to a very large hydroelectric plant and convince them to sell electricity to you at well below wholesale.

No electromagnets or neutron guns required.

The felt-like covering on a card table is typically made of a material called baize, which is a type of woolen cloth. It provides a smooth and slightly cushioned surface that is ideal for card games. Baize is known for its durability and ability to hold up well to frequent use.

Elements in the same group have similar chemical properties because they have the same number of valence electrons, which determines how they interact with other elements. This leads to similar reactivity patterns among elements within the same group.

Carbon is considered a nonmetal. It has an atomic symbol of C and atomic number of 6. It is a solid in its standard state.

Democritus was an ancient Greek philosopher who lived around the 5th century BCE. He is known for his development of the atomistic theory of the universe, which proposed that everything is made up of tiny, indivisible particles called atoms. However, it is important to note that Democritus did not invent the concept of atoms; rather, he expanded on earlier ideas from philosophers like Leucippus.

Fire fighting school in the 1970s taught us 15% oxygen level si necessary to support combustion.

In a natural situation, no. Current levels of CO2 are 0.038% Levels of over 15% would be needed to even slow the burn down. Lack of Oxygen would be the determining factor

A pure substance found in nature can be either a metal or a non-metal. Metals such as iron, gold, and copper are found in pure forms in nature, while non-metals like sulfur and graphite can also be found in pure forms. It depends on the specific element and its properties.