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Nobelium is also known as Alfred Nobel is a synthetic element made in small numbers. It belongs to the actinide series. Nobelium is named after the creator of dynamite, Alfred Nobel. Nobelium is a chemical element with the atomic number 102, which implies it has 102 protons and 102 electrons. The chemical symbol of nobelium is ‘No’.
| Table of Content |
Key Terms: Electron, Proton, Element, Synthetic Element, Actinide, Metal
What is Nobelium?
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Nobelium is a chemical element discovered by two groups of scientists in the early 1960s. Nobelium is produced in small quantities and utilized for research and has no biological significance. It belongs to the actinide family.
Nobelium is thought to be a divalent metal. Nobelium atoms are made up of 102 electrons. Three of these electrons exhibit valence electron properties. Nobelium is a highly radioactive and hazardous metal formed in nuclear reactors and another radioactive element, curium.
Nobelium
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Atomic Mass of Nobelium
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Nobelium has an atomic mass of 259 u. The mass of an atom is defined as its atomic mass. The atomic mass refers to the mass of a single particle and is thus associated with a specific isotope of an element.
The atomic mass is carried by the atomic nucleus which occupies only about 10- 12 of the total volume of the atom. But includes all of the positive start and at least 99.95% of the entire mass. Because each element may have multiple isotopes, the resultant atomic mass is computed using naturally occurring isotopes and their abundance.
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| Concept Related To Nobelium | ||
|---|---|---|
| IUPAC Nomenclature | Transuranium elements | Einsteinium |
Electrons And Electron Configuration Of Nobelium
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The number of protons in the nucleus equals the number of electrons in an electrically neutral atom. Result, the number of electrons in a ‘Nobel;ium’ neutral atom is 102. The electric fields created by the positive nuclear charge and the other (Z-1) negative electrons in the atom impact each electron.
The atomic number identifies the distinct chemical elements because the number of electrons and their arrangement is crucial for the chemical activity of atoms. The arrangement of these electrons is dictated by quantum mechanics laws.
The number of electrons in each element’s electrons shells, particularly the outermost valence shell, determines its chemical bonding behaviour. The elements in the periodic table are given in increasing atomic number Z-order. The possible oxidation states are possible are +2,3.
Nobelium’s electron configuration is
| [Rn] 5f14 7s2 |
Atomic Radius Of Nobelium
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Nobelium has an atomic radius of -pm (covalent radius).
Atom
It should be observed that atoms lack a clearly defined outer border. A chemical element’s atomic radius is a measurement of the distance of the electron cloud from the nucleus. It is presupposed that the atom has a spherical form. As a result, there exist several non-equivalent definitions of atomic radius.
- The radius of van der Waals:- In theory, the Van der Waals radius is half the shortest distance between the nuclei of two elemental atoms that are not bonded to the same molecule.
- The radius of ionization:- In an ionic connection, an ionic radius is one-half the distance between the nuclei of two ions.
- The radius of covalent bonding:- Covalent radius is the nominal radius of an element’s atoms when they are covalently bonded to other atoms.
- The radius of metal:- When linked to other atoms by metallic bonds, a metallic radius is one-half the distance between the nuclei of two neighbouring atoms in a crystalline structure.
Atomic radius tends to rise while travelling down columns on the periodic table, but it decreases when moving across rows (left to right).
Nobelium Neutron Number And Mass Number Of Nobelium
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The mass number of common Nobelium isotopes is
| 253-255,257,259 |
The total number of neutrons in an atom’s nucleus is referred to as the atom’s neutron number and is denoted by the sign N. The sum of the neutron and atomic numbers equals the atomic mass number: N+Z = A. The neutron excess is defined as the difference between the neutron number and the atomic number: D = N -Z = A - 2Z.
Density Of Nobelium
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Nobelium has a density of
| 9.9g/cm3 |
The mass per unit volume is known as density. It is an intense attribute, defined mathematically as mass divided by volume:
ρ = m/V
In Other (V) filled by that substance. The SI unit of measurement is kg per cubic meter (kg/m3). Pounds mass per cubic foot (Ibm/ft3)is the standard English unit.
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| Chapter Related Topics | ||
|---|---|---|
| Element | Nihonium | Classification of Elements and Periodicity in Properties |
Things To Remember
- Nobelium is a chemical element with the atomic number 102, which implies it has 102 protons and 102 electrons.
- Nobelium has an atomic mass of 259 u.
- It belongs to the actinide series.
- Nobelium has a density of 9.9g/cm3.
- The neutron excess is defined as the difference between the neutron number and the atomic number: D = N -Z = A - 2Z.
- The sum of the neutron and atomic numbers equals the atomic mass number: N+Z = A.
Sample Questions
Ques. What are the uses of nobelium? (2 Marks)
Ans. Nobelium has no use other than for scientific research; it has limited usage due to its extremely unstable nature. Nobelium has no known biological role. It is toxic due to its radioactivity.
Ques. Define the radius of van der waals. (2 Marks)
Ans. The radius of van der waals:- In theory, the Van der Waals radius is half the shortest distance between the nuclei of two elemental atoms that are not bonded to the same molecule.
Ques. State three physical properties of nobelium. (3 Marks)
Ans. The three physical properties of nobelium are:
- Atomic mass of nobelium is 259
- Isotopes 20
- Natural state of nobelium is synthetic
Ques. How harmful is nobelium to the environment? (2 Marks)
Ans. Nobelium is not stable at all and it decomposes into other forms very fast and also doesn't interfere with nature. Since it possesses a short-half life.
Ques. What is nobelium? (5 Marks)
Ans. Nobelium is a chemical element discovered by two groups of scientists in the early 1960s. Nobelium is produced in small quantities and utilized for research and has no biological significance. It belongs to the actinide family.
Nobelium also known as Alfred Nobel is a synthetic element made in small numbers. It belongs to the actinide series. Nobelium is named after the creator of dynamite, Alfred Nobel. Nobelium is a chemical element with the atomic number 102, which implies it has 102 protons and 102 electrons. The chemical symbol of nobelium is No.
Nobelium is thought to be a divalent metal. Nobelium atoms are made up of 102 electrons. Three of these electrons exhibit valence electron properties. Nobelium is a highly radioactive and hazardous metal formed in nuclear reactors and another radioactive element, curium.
Ques. What is the atomic structure of nobelium? (1 Mark)
Ans. Its electronic configuration is 1s2 2s2 p6 3s2 p6 d10 4s2 p6 d10 f14 5s2 p6 d10 f14 6s2 p6 d10.
Ques. State the chemical properties of nobelium. (3 Marks)
Ans. The three chemical properties of nobelium is:
- Number of electrons in nobelium is 102
- Number of protons in nobelium is 102
- The oxidation state of nobelium is 2,3
Ques. What is the atomic mass of nobelium? (3 Marks)
Ans. Nobelium has an atomic mass of 259 u. The mass of an atom is defined as its atomic mass. The atomic mass refers to the mass of a single particle and is thus associated with a specific isotope of an element.
The atomic mass is carried by the atomic nucleus which occupies only about 10 – 12 of the total volume of the atom. But includes all of the positive start and at least 99.95% of the entire mass. Because each element may have multiple isotopes, the resultant atomic mass is computed using naturally occurring isotopes and their abundance.
Ques. What are the facts about the nobelium? (3 Marks)
Ans. Nobelium is not yet discovered in the earth's crust and it can be easily decomposed into other elements due to its instability. Nobelium is made by bombarding curium with carbon in a device called a cyclotron. Nobelium is a radioactive metal. Only a few atoms have ever been made. Its half-life is only 58 minutes.
Ques. How hard is nobelium? (3 Marks)
Ans. Nobelium is the second transfer element with the most stable isotope 259Md having a half-life of 58 minutes. Its chemical data are limited to its atomic number, its half-life, and isotopes. The transfer elements do not exist in nature and they have very unstable nuclei, so they are quite hard to make and detect.
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