What is the common characteristic of the elements of the same group in the periodic table?
Electrons in the outer most shell
Elements in the same group (vertical column) of the periodic table share the same number of valence electrons — i.e. electrons in the outermost shell. This common valence configuration produces their similar chemical reactivity and bonding behaviour.
Total electrons and total protons differ for each element (they define separate atomic numbers), and atomic weight increases steadily down a group, so none of these stay constant within a group.
Fire extinguishers emit which gas?
In the following reaction, fill in the blank.
Acid + Base → _______ + Water
Which of the following is a characteristic of an exothermic reaction?
Ozone is an ______ of oxygen.
Which amongst the following is not a cation?
Which of the following bonds are weakest in nature?
What is the chemical name of saltpetre?
The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.
What is the bond angle (in degrees) in the structure of a benzene molecule?
Fire extinguishers emit which gas?