What is the atomic number of Promethium?
43
55
57
61
Correct answer is D
No explanation has been provided for this answer.
2Cl2(g) + 2H2O(g) 4HCl(g) + O2(g) ∆H° = +115KJ mol-1. In the above equilibrium reaction, a decr...
28.8 cm3 of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?...
Given that 32.0g sulphur contains 6.02 x 10 23 sulphur atoms how many atoms are there in 2.70g of al...
In the graph above, the activation energy of the catalyzed reaction is...
The dispersion of a liquid in a liquid medium will give ...
The energy required to remove the most loosely bound electron from an atom in the gaseous state is k...
In any chemical reaction, the total mass of the products is always equal to that of the reactants. T...
A characteristic of the alkane family is ...
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-met...
Neutralization involves a reaction between H3O+ and?...
Logical Reasoning Questions and Answers
Puzzles Questions and Answers
Nigeria General Knowledge Questions and Answers
Typing Speed and Accuracy Test
Numerical Reasoning Questions and Answers
Data Interpretation Questions and Answers
Personality Test
Situational Judgement Questions and Answers
Spatial Reasoning Questions and Answers
Quantitative Reasoning Questions and Answers
Abstract Reasoning Questions and Answers
Verbal Reasoning Questions and Answers
Microsoft Office Questions and Answers
See all →