Answer:
The answers to your questions are below:
Explanation:
Question 31 Silicon and sulphur, because they are in the same period (3)
Question 34 the third option, density is not in the table
Question 37 group 1A alkali metals
Question 38 group 1A, oxygen group
Question 39 They are metalloids
Gamma rays
gamma rays has shortest wavelength which emits from the sun so it has highest energy because energy and wavelength are inversely proportional to each other.
When alpha particles are used to bombard gold foil, most of the alpha particles pass through undeflected. This result of the experiment indicates that most of the volume of a gold atom consists of unoccupied spaces. This was an experiment done by Ernest Rutherford which allowed him to verify the presence of the a small region positive charge in an atom which is called as the nucleus of the atom. Most of the alpha particles pass through the foil while a certain amount were deflected. Those that pass through confirmed that there is a large area that is unoccupied in an atom.
