The number of electrons presents in H+ is
Answer: A
No answer description available for this question.
Enter details here
The metal which reacts most violently with with cold water is
Answer: D
Potassium reacts violently with water liberating hydrogen. The reaction is so violent that the liberated hydrogen catches fire.
Enter details here
Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
Answer: B
No answer description available for this question.
Enter details here
Which one of the following elements is essential for construction is nuclear reactors
Answer: C
No answer description available for this question.
Enter details here
Water always contains hydrogen and oxygen in the ratio 1:8 by weight.This is in accordance with the
Answer: B
No answer description available for this question.
Enter details here
Acid Precipitation is caused by a mix of
Answer: D
No answer description available for this question.
Enter details here
Which of the following atoms has the largest radius?
Answer: B
For neutral atoms, the periodic trends in atomic size can be described like this
Atomic size decreases when going from left to right across a period,
Atomic size increases when going from top to bottom down a group.
Let's use these trends to try and figure out which atom would have the largest radius.
If you look at elements that are located in the same group, potassium will have a larger atomic radius when compared with sodium. Likewise, bromine will have a larger atomic radius when compared with chlorine.
Now focus on potassium and bromine. Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.
Enter details here
Dimond is
Answer: A
No answer description available for this question.
Enter details here
The oldest known organic compound is
Answer: C
No answer description available for this question.
Enter details here
The cyclotron is used to
Answer: D
No answer description available for this question.
Enter details here