Periodic classification of elements Worksheet-2
A. Atomic number
B. Electronic configuration
C. Atomic weight
D. Number of electrons in the outermost shell or valence electrons
A. 1 and 7 groups B. 2 and 6 groups
C. 3 and 5 groups D. 0 and 7 groups
A. Na B. Cu C. Au D. Be
A. Metals B. Metalloids
C. Non-metals D. Transition elements
A. Continuosly decreases
B. Continuosly increases
C. Remains constant
D. Increases but not continuously
A. Atomic number B. Atomic weight
C. Atomic mass D. None of these
A. Be > F > C > Ne B. Be < C < F < Ne
C. Be > C > F > Ne D. F < Ne < Be < C
A. Oxygen family B. Nitrogen group
C. Halogens D. Alkali metals
A. Nm B. Cm C. Å D. m
C. Remain constant
D. First decreases and then increases
Explanation: All the elements belonging to the same group have the same number of electrons.
Explanation: Ionic bond is formed when there is large difference of electro-negativities between the atoms.
Explanation: Be : 1s2 2s2 Beryllium belongs to group 2. It will have 2 electrons in the valence shell.
Explanation: Elements on the right side of the periodic table
are mostly non-metals.
Explanation: Continuously decreases as the effective nuclear charge increases.
Explanation: Size of atom increases down the group.
Explanation: Be > C > F > Ne. Atomic size decreases across a period.
Explanation: Halogens form anions most easily as they require only one electron to complete their octet.
Explanation: Atomic radii are expressed in Å units.