What is the atomic number of Promethium?
...What is the atomic number of Promethium?
43
55
57
61
Correct answer is D
No explanation has been provided for this answer.
What volume of oxygen will remain after reacting 8cm3 of hydrogen with 20cm3 of oxygen?...
What is the solubility product constant (Ksp) used for? ...
Which of the following pollutants will lead to the depletion of ozone layer? ...
n monosaccharide \( \underset{Q}{\stackrel{P}{\rightleftharpoons}} \) polysaccharide -n water. In...
Using the metal activity series, the metal that can liberate hydrogen gas from steam is? ...
CH4(g) + CI2(g) \(\to\) CH2CI(s) + HCIg The major factor that influences the rate of the reaction...