Classification of Elements and Periodicity in Properties - Online Test
Q1. According to IUPAC nomenclature for elements with Z greater than 100,the root 'sept' corresponds to the digit:
Answer : Option B
Explaination / Solution:
Sept is for 7.
Numerical 0 1 2 3 4 5 6 7 8 9
roots nil un bi tri quad pent hex sept oct en
Q2. Atomic number of element Unnilhexium is:
Answer : Option D
Explaination / Solution:
un=1 Nil=0 Hex=6 So 106=uninilhexium.
Q3. According to IUPAC nomenclature,element Ununnillium have an atomic number of:
Answer : Option A
Explaination / Solution:
un=1 nil=0 So 110 = ununnilium.
Q4. Electronic configuration of an element is:
Answer : Option A
Explaination / Solution:
The electronic configuration of an atom, describes the arrangement of electrons in space around the nucleus. The electrons are distributed over different energy level. These energy levels are called the shell or orbits.
Q5. The third period (n = 3) begins at sodium with addition of first electron to
Answer : Option B
Explaination / Solution:
The electronic configuration of sodium is 1s2 2s2 2p6 3s1. The valence electron is in 3s orbital.
Q6. Before the 4p orbital is filled, filling up of 3d orbitals becomes energetically favourable and there are 3d transition series of elements. This starts from scandium (Z = 21) which has the outermost electronic configuration of.
Answer : Option C
Explaination / Solution:
The electronic configuration of scandium is [Ar] 3d1 4s2.
Q7. Maximum number of electrons occupied by s,p and d orbitlas are:
Answer : Option A
Explaination / Solution:
s-orbital ml=0, so it can accommodate 2 electron.
p-orbital has ml = -1,0,+1. It can accommodate 6 electrons.
d-orbital has ml = -2,-1,0,1,2.It can accommodate 10 electrons.
Q8. s-block elements comprise of
Answer : Option A
Explaination / Solution:
s-block contains two group of elements including alkali earth metal and alkaline earth metal.
Q9. All the orbitals in the valence shell of the noble gases
Answer : Option A
Explaination / Solution:
These elements are called noble elements beacuse they contain ns2, np6 valence shell electronic configuration. A complete octet in the outermost shell makes these elements chemically stable, and therefore they do not easily react with other elements to form compounds.
Q10. d-Block Elements are characterized by the
Answer : Option B
Explaination / Solution:
d-Block elements also known as transition elements are characterized by the filling of inner d orbitals by electrons before the valence-shell s orbital.
