WebCompare . Astatine and BromineCompare . Astatine and Bromine on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. WebNov 26, 2024 · In the case of liquid to gas phase change, this amount of energy is known as the enthalpy of vaporization (symbol ∆H vap; unit: J), also known as the (latent) heat of vaporization or heat of evaporation. As an example, see the figure, which describes the phase transitions of water. Latent heat is the amount of heat added to or removed from a ...
Group 17: General Properties of Halogens - Chemistry LibreTexts
WebAug 15, 2024 · Name: Astatine Symbol: At Atomic Number: 85 Atomic Mass: (210.0) amu Melting Point: 302.0 °C (575.15 K, 575.6 °F) Boiling Point: 337.0 °C (610.15 K, 638.6 °F) Number of Protons/Electrons: 85 Number of Neutrons: 125 Classification: Halogen Crystal Structure: Unknown Density @ 293 K: Unknown Color: Unknown Date of Discovery: 1940 WebPhysical Properties. Astatine is an element in the periodic table with atomic no. 85 and atomic mass 210 grams per mol. Some of the physical properties of astatine are based … genesis pictures
Physical properties of astatine-211. Color images are available …
WebGroup name: Halogen. Period in periodic table: 6. Block in periodic table: p. Shell structure: 2.8.18.32.18.7. CAS Registry: 7440-68-8. Astatine atoms have 85 electrons and the shell structure is 2.8.18.32.18.7. The ground … Webastatine, Radioactive chemical element and the heaviest halogen element, chemical symbol At, atomic number 85. It was first synthetically produced in 1940 from the bombardment of bismuth by alpha particles and neutrons. None of its 33 isotopes are stable; astatine-210, with a half-life of 8.3 hours, is the longest-lived. http://www.chemistryexplained.com/elements/A-C/Astatine.html death of samantha josephson