To which group and period respectively does an element with 15 electrons belong?
3 and 3
3 and 5
5 and 3
5 and 5
Correct answer is C
(P) Arsenic is the element with 15 electrons which is found in Group 5 and Period 3
The bond formed when ammonia reacts with hydrogen ion to form ammonium ion is
Covalent
Dative
Hydrogen bond
Ionic
Correct answer is B
No explanation has been provided for this answer.
The number of unpaired electrons in an atom of an element 8Q is _______?
2
4
6
8
Correct answer is A
No explanation has been provided for this answer.
The alkaline earth metals have similar chemical properties because________?
They are in the same period
Their salts are colourless
They have the same number of valence electrons
They are very reactive
Correct answer is C
No explanation has been provided for this answer.
Which of the following halogens is solid at room temperature?
Bromine
Chlorine
Flourine
Iodine
Correct answer is D
No explanation has been provided for this answer.