What number of valence electrons does Rubidium (Rb) possess?

What is the valency of rubidium Valence electrons

Rubidium is 37th element on the periodic table. The element of group-1, rubidium, has the symbol ‘Rb‘. Rubidium is an acidic metal. Rubidium bonds are formed by its – valence electrons. This article explains in detail how rubidium’s valence electrons work. You will learn more about this topic after you have read this article.

Rubidium is a chemical element found on the periodic table with the symbol rb and atomic number 37. It is a soft, silvery-white metal that belongs to the alkali metals group. This element is highly reactive, and it can easily form compounds with other elements due to its low ionization energy.

Rubidium has many interesting properties that make it unique among other elements. For example, it has one of the highest densities among all elements at 1.532 g/cm3, making it particularly heavy for its size. It also has one of the highest melting points among all alkali metals — just over 39 degrees celsius!

Rubidium’s reactivity makes it useful in many applications such as in fireworks and flash photography where its bright red-violet colour is used to create stunning visuals. It can also be used in lasers and photocells due to its ability to absorb light quickly and efficiently.

In addition, rubidium can be found naturally in some minerals as well as seawater and rocks from volcanic eruptions. Its most common isotope is rb87 which accounts for 72% of all rubidium atoms in nature — this isotope makes up around 0.012% of earth’s crust by weight!


It was first discovered in 1861 by german chemist robert bunsen and german physicist gustav kirchhoff, who detected its spectral lines during an experiment. Since then, it has become an important element in many industries and applications.

Rubidium is a soft, silvery-white metal that belongs to the alkali group of elements. It is highly reactive and can easily form compounds with other elements. Its most common use is in atomic clocks, which use rubidium atoms to measure time more accurately than traditional clocks. Rubidium also finds use in glassmaking and electronics manufacturing, as well as some medical treatments such as cancer therapy.

The history of rubidium dates back to 1879 when swedish chemist per teodor cleve discovered it while analyzing mineral samples from stassfurt, germany. He named it after the latin word for «deep red,» which describes the color of its flame test emission spectrum. Since then, scientists have studied its properties and uses extensively, leading to its widespread application today.

Rubidium has had a long history since it was first discovered over 150 years ago by bunsen and kirchhoff. Its unique properties make it an essential element for many industries today including glassmaking and electronics manufacturing; however, its most notable use is in atomic clocks where its atoms are used to measure time more precisely than traditional clocks ever could!

Place of strontium in the periodic table

Place of strontium in the periodic table

Rubidium Basic Facts

  • Atomic Number: 37
  • Symbol: Rb
  • Atomic Weight: 85.4678
  • Electron Configuration: [Kr] 5s1
  • Discovery: R. Bunsen, G. Kirchoff 1861 (Germany), discovered rubidium in the mineral petalite via its dark red spectral lines.


Rubidium is used in many different ways, from medical applications to industrial processes. In medicine, rubidium is used as an imaging agent for diagnosing cardiac conditions and cancerous tumors. It also has been used to treat depression, anxiety, and other mental health disorders. In the industrial world, rubidium can be found in lubricants, paints, dyes, and other products.

Rubidium also has applications in electronics. It is used as a semiconductor material for making transistors and integrated circuits due to its high electrical conductivity. Additionally, it can be used as an alloying agent in steel production or as a catalyst for certain chemical reactions such as hydrogenation or polymerization reactions.

Rubidium also plays an important role in astronomy because of its unique spectral lines which are visible even at very low temperatures. These spectral lines allow astronomers to measure distances between stars by calculating their redshift values which indicate how fast they are moving away from us due to the expansion of the universe.

Biological function

Rubidium does not have any known biological functions and is therefore non-toxic. Due to its chemical similarity with potassium, we absorb it through our food. An average person has about half of a gram of Rubidium.

It is slightly radioactive so it can be used to locate brain tumors.


Rubidium has two naturally occurring isotopes: rb-85 and rb-87. These two isotopes account for nearly all of the rubidium found in nature, as there are only traces of other rubidium isotopes. Rb-85 has an abundance of 72.2%, while rb-87 makes up 27.8%.

The properties of these two natural rubidium isotopes are very similar to each other, although their atomic masses differ slightly due to their different numbers of neutrons. For example, both have a melting point around 39°c (102°f) and boiling point around 688°c (1,270°f). They also both react vigorously with oxygen and water when heated or exposed to light or radiation.

In addition to these two natural rubidium isotopes, there are several others that can be created artificially in nuclear reactors or particle accelerators. These include rb-83, rb-84, rb-86 and more recently discovered ones like rb-82 and rb-88. All these artificial isotopes have relatively short half lives ranging from picoseconds to hours or days depending on the particular element involved in the reaction used to create them

Rubidium’s two natural isotopes -rb 85 & 87 — play an important role in many scientific fields such as geology and nuclear physics due to their stability compared to other elements’ unstable radioactive forms. They have also been used in medical applications such as pet scans for cancer detection since they emit positron radiation when exposed to certain conditions.
Overall, rubidium’s natural & artificial isotopic forms provide scientists with valuable insights into various aspects related to our world.

Rubidium Health effects

Rubidium is an alkali metal that plays a role in many biological processes. It helps regulate nerve impulses, muscle contractions, and heart rate. It also helps with the metabolism of carbohydrates and fats. Additionally, it aids in the absorption of calcium and magnesium into bones.

In terms of mental health, rubidium has been shown to help reduce anxiety and depression symptoms. Studies have also demonstrated that it can improve memory and cognitive performance among people with alzheimer’s disease or other forms of dementia.

Furthermore, rubidium may be beneficial for people with diabetes by improving insulin sensitivity and reducing blood sugar levels. Additionally, it has been linked to lower cholesterol levels in those who are at risk for cardiovascular disease or stroke.

Finally, research suggests that rubidium may be able to reduce inflammation throughout the body which can help prevent certain chronic diseases such as arthritis or cancer from developing or worsening over time.

Rubidium Physical Data

  • Density (g/cc): 1.532
  • Covalent Radius (pm): 216
  • Ionic Radius: 147 (+1e)
  • Melting Point (K): 312.2
  • Atomic Radius (pm): 248
  • Atomic Volume (cc/mol): 55.9
  • Specific Heat (@20°C J/g mol): 0.360
  • Evaporation Heat (kJ/mol): 75.8
  • Appearance: soft, silvery-white, highly reactive metal
  • CAS Registry Number: 7440-17-7
  • Fusion Heat (kJ/mol): 2.20
  • Pauling Negativity Number: 0.82
  • Oxidation States: +1
  • First Ionizing Energy (kJ/mol): 402.8
  • Lattice Structure: Body-Centered Cubic
  • Lattice Constant (Å): 5.590
  • Boiling Point (K): 961

What are the valence electronics of rubidium?

The valence electrons is the number of electrons within the last orbit (shell). The valence of rubidium is the sum of all electrons found in the shell following the configuration of rubidium. The element’s properties are determined by the presence of valence electrons, which also play a role in bond formation.

How many protons or electrons does rubidium contain?

The nucleus is located at the center of an atom. In the nucleus are protons and neutrons. The atomic quantity of rubidium has 37. The number of protons in a substance is known as the atomic number. This means that there are 37 protons in rubidium. A circular shell located outside the nucleus houses electrons equal to protons. This means that a rubidium-atom contains a total of 327 electrons.

Valence is the ability of an atom of a chemical element to form a certain number of chemical bonds with other atoms. It takes values from 1 to 8 and cannot be equal to 0. It is determined by the number of electrons of an atom spent to form chemical bonds with another atom. The valence is a real value. Numerical values of valence are indicated with roman numerals (I,II, III, IV, V, VI, VII, VIII).

How do I calculate the number valence electrons within a rubidium atom

Following a few steps, you can determine the valence of electrons. The electron configuration is one. It is impossible to determine valence electron without knowing electron configuration. It is simple to identify the configuration of the electrons for all elements.

How do you calculate the number of valence electrons in a rubidium atom

However, it is possible to identify valence elements by simply arranging electrons in accordance with the Bohr principle. This is how we’ll find out the valence neutrons of rubidium.

Determining the total amount of electrons present in rubidium

We first need to determine the total number electrons in the rubidiumatom. You must know the number protons in rubidium to find the number of electrons. You will also need to know what the atomic numbers of the elements of rubidium are in order to determine the number of protons.

The periodic table can be used to calculate the atomic numbers. The periodic table provides information on the atomic number for rubidium elements. The number of protons in an atom is called the “atomic number”. Additionally, electrons equal to protons can be found outside of the nucleus.

We can thus finally conclude that the atomic number of the rubidium atom has an electron count equal to it. We can see that the atomic numbers of rubidium are 37 from the periodic tables. The total electron count of the rubidium-atom is therefore 37.

Perform electron configuration of rubidium

The arrangement of the electrons of rubidium is required in this step. We know that rubidium has a total number of 37 electrons. The first shell of rubidium is composed of two electrons. Second shell contains eight electrons. Third shell has eighteen. Fourth shell has eighteen. Fifth shell has an electron. The number of electrons in a shell of rubidium is 2, 8 and 18, respectively.

The terms “oxidation degree” and “valence” may not be the same, but they are numerically almost identical. The conditional charge of an atom’s atom is called the oxidation state. It can be either positive or negative. Valence refers to the ability of an atom form bonds. It cannot have a negative value.

Determine the valenceshell and calculate the total electrons

The third step involves diagnosing the valenceshell. The valenceshell is the shell that follows the electron configuration. The total number electrons within a valenceshell are called valence electrons. The electron configuration in rubidium shows that every shell of rubidium contains an electron. Accordingly, the valence elements of rubidium (Rb), are one.

How many valence elements does rubidium-ion(Rb +), have?

The elements that have 1 to 3 electrons in their shells donate their electrons during bond formation. Cations are elements which donate electrons in order to form bonds. The rubidium-atom donates one electron from the last shell to make bonds, and then turns into a Rubidium Ion (Rb +). This is why rubidium can be described as a cation element.

How many valence electrons does rubidium ion(Rb+) have

The electron configuration for rubidium (Rb+), is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6. This electron configuration shows the rubidium-ion (Rb+) has four shells, and the final shell has eight electrons. The electron configuration shows how the rubidium Ion has acquired the electron configuration of Krypton. The eight electrons in the rubidium (Rb+) valence electrons are eight.

  1.  The valence is a numerical characteristic of the ability of atoms of a given element to bond with other atoms.
  2. The valence of hydrogen is constant and equal to one.
  3. The valence of oxygen is also constant and equal to two.
  4. The valence of most of the other elements is not constant. It can be determined by the formulas of their binary compounds with hydrogen or oxygen.

What is the valency for rubidium?

Valency is the ability for an element’s one atom to bond with another during the formation a molecule. The element’s valency refers to the number of unpaired elements in its last orbit.

What is the valency of rubidium

The electron configuration shows that rubidium has an unpaired electron (5s1) in its last orbit. Accordingly, rubidium’s valency is 1.


Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Guide-scientific.com. Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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