WebWhich of the following traits characterizes the alkali metals? a. the lowest first ionization energies in a period b. the smallest atomic radius in a period c. existence as diatomic molecules d. very high melting point e. formation of dianions a. the lowest first ionization energies in a period Weba) They are very reactive elements. b) They all have 2 electrons in their valence shells. c) They have the lowest first ionization energies of the elements. d) They are low density solids at room temperature. e) They all readily form ions with a +1 charge. B The alkali metal that is naturally radioactive is ________________. a) lithium b) cesium

Francium - Wikipedia

Web18 de ago. de 2024 · In the alkali group, as we go down the group we have elements Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr). Several physical properties of these elements are compared in Table 7.7. 1. These elements have all only one electron in their outermost shells. WebTo further explore these chemical differences in alkali metal concentrations (Table 2), chemical analysis was followed by an XRD study (Buxeda et al . 2002) in order to ... Where -α and -β correspond to the radiation emitted by the radioactive elements of U, Th, 40 K and, in very small amounts, by Rb dominant in the ceramic matrix (internal ... bugsnax go for the gold

Francium - Wikipedia

WebA Alkali metals have lower boiling points than iron. B Alkali metals are softer than iron. C Alkali metals are denser than iron. D Alkali metals are more reactive than iron. E Alkali … WebLi, Na, K, Rb, and Cs are all group IA elements, also known as the alkali metals. The seventh member of the group, francium (Fr) is radioactive and so rare that only 20 … The alkaline earth metals are named after their oxides, the alkaline earths, whose old-fashioned names were beryllia, magnesia, lime, strontia, and baria. These oxides are basic (alkaline) when combined with water. "Earth" was a term applied by early chemists to nonmetallic substances that are insoluble in water and resistant to heating—properties shared by these oxides. The realization t… crossfit games slam ball