Atomic Structure and Periodicity - SS2 Chemistry Past Questions and Answers - page 1
Which of the following subatomic particles has a positive charge?
Proton
Electron
Neutron
None of the above
The atomic number of an element is defined by the number of:
Protons
Electrons
Neutrons
Nucleons
Which of the following subatomic particles has a negligible mass?
Proton
Electron
Neutron
All of the above
Isotopes of an element have the same number of:
Protons
Electrons
Neutrons
Nucleons
The horizontal rows in the periodic table are called:
Groups
Periods
Families
Valence shells
Elements in the same group of the periodic table have the same number of:
Protons
Electrons
Neutrons
Shells
The noble gases belong to which group in the periodic table?
Group 1
Group 2
Group 17
Group 18
The atomic radius generally increases:
From left to right across a period
From top to bottom within a group
Both A) and B)
Neither A) nor B)
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1?
Potassium (K)
Calcium (Ca)
Rubidium (Rb)
Francium (Fr)
The element with the symbol Fe belongs to which group in the periodic table?
Group 1
Group 8
Group 9
Group 11