सच्याउंन आधानिक परियोडिक तालिका सफल भयो वा भएन, मूल्याङ्कन गनुहोस् List out two demerits of Mendeleev's period table. Analyses modern penodic
table is able to overcome these dements or not.
दिदाको तालिका अध्ययन गरी सोधिएका प्रश्नहरुका उत्तर लेख्नुहोस्​

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Draw the structure for 5-isopropyl-2-methyl-3-nonene