[Chemistry Class Notes] Lawrencium Pdf for Exam

This is a synthetic chemical element, whose atomic number is 103, it is represented in a periodic table with the symbol Lr. Lawrencium is synthesized from California. Earlier it was known as eka-lutetium. It is a radioactive transuranic element. In applied chemistry (IUPAC) the official name of the element initially established Lawrencium and the American team gave credit for the discovery. Lawrencium was created by accelerating subatomic particles that have been surrounded by a circle, and it never occurs as a free element in nature. With the most stable isotope 262 Lr having a half-life of 216 minutes is the second transferium element. A man-made element was discovered in 1965, Lawrencium is an actinide metal. It is a transferium element which has neither application nor economic role. Lawrencium element atomic mass 262 g.mol-1. In the periodic table, Lawrencium behaves as a heavier homolog to lutetium and is a trivalent element that chemistry experiments have confirmed. Lawrencium also can be classified as the first of the 7th-period transition metals.

Atomic Structure of Lawrencium

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Chemical Properties of Lawrencium

1. Group: Actinides

2. Period: 7

3. Block: f

4. Atomic Number: 103

5. State at room temperature (20oC): Solid

6. Electron configuration: (Rn) 5f147s27p1

7. ChemSpider ID: 28934 (It is a free chemical structure database)

8. Melting point: 1627oC, 296oF, 1900 K

9. Relative atomic mass: 262

10. Oxidation states: +3

Properties of Lawrencium

1. Isotopes of this element are radioactive.

2. Isotopes of Lawrencium have a half-life of eleven hours.

3. It is not that much of use, mainly used in scientific research.

4. Lawrencium is of silver-white color.

5. In the actinide series, it is the heaviest element.

6. It is not available outside of the laboratory due to its short life.

7. For the position in the periodic table, its electron configuration is anomalous.

8. Lawrencium behaves as a heavier homolog to lutetium in the periodic table that chemistry experiments have confirmed.

9. Lawrencium is a trivalent element. 

10. There are 13 isotopes of Lawrencium currently known, within them the most stable is 266 Lr, which has a half-life of 11 hrs, and the shorter-lived is 260 Lr which half-life is 2.7 minutes.

Application of Lawrencium

1. Due to its radioactive nature, Lawrencium does not have that much of use.

            Lawrencium is purely used for scientific research only.

2. There is no commercial use of Lawrencium as only a few atoms of this have been made.

3. This element can be used for technical purposes and harvesting energy.

4. The isotope of Lawrencium, 260 Lr is commonly used in chemistry, because it can be produced on a large scale.

5. Van der Waals radius of the Lawrencium atom is 246 pm.

Health Effect of Lawrencium

Lawrencium is not found naturally, till now it has not been found in the earth crust, it is very unstable though it formed any amount instantly it transformed to another element. That’s why there is no reason for Health effect.

There is no environmental effect also due to its short half-life.

Fun Facts

1. Lawrencium does not form naturally, it can be produced artificially and only been made in small quantities.

2. Currently, there is no use except scientific research.

3. Lawrencium is named upon Ernest Lawrence who was the inventor of cyclotron.

4. It was discovered at the University of California by Albert Ghiorso.

5. Lawrencium is radioactive and considered as toxic.

6. There is no health effect or environmental effect of Lawrencium. Lawrencium may be harmful only for its radioactivity when it is handled in the laboratory.

7. Lawrencium has no isotopes which can occur naturally.

8. Lawrencium is a synthetic metal. Lawrencium is a solid element.

9. Lawrencium is the final member of the actinide series and is the eleventh transuranic element.

10. Lawrencium is an actinide series element, it is one of the rare earth elements which is located in group 3 elements of the periodic table and in the 6th and 7th periods.

11. Lawrencium is the second transferium element which has the most stable isotope 262 Lr.

12. Only lawrencium can be produced in particle accelerators by bombarding lighter elements with charged particles among all elements with atomic number over 100.