The document contains questions related to periodic table and its elements. The questions are precisely selected and are of a good level. These questions are gonna make your concepts crystal clear. They'll help you revise the topic really quick
EXERCISE 1
SUBJECTIVE QUESTIONS
1. Explain the following:
(i) Why argon (atomic mass =39.94) has been placed before potassium (atomic mass =39.10) in the
Modern periodictable?
(i) There are only 14 lanthanides and only 14 actinides in Modern periodic table.
2. Why the third period of Modern periodic table contains 8 elements and not 18?
3. Tell the relation between effective nuclear charge (Z), atomic number (Z) and shielding constant (o).
Explain it qualitatively
4. Which orbital electrons are known to shield the nuclear
charge improperly ? Does this generate
iregularity in properties of elements?
5.
5.3 Pbt* compounds are very good oxidising agents. Explain.
6. Arrange the following in correct order of stability:
) Ga, In, TI (i)Ass, Sb5, Bis
7. Explain why cations are smaller and anions larger in radii than their parent atoms?
8.3 The atomic radii of palladium and platinum are nearly same. Why ?
9. Inthe ionic compound KF, the K and F ions are found to have practically identical radi, about 1.34 Aeach
What can you predict aboutthe relative atomic radii of K & F?
10. Why second ionization enthalpy is always higher than the frst ionisation enthalpy for every element ?
11.
11. The first ionization enthalpy of carbon is greaterthan that of boron, whereas the reverse is true for second
onization enthalpy. Explain.
12. Among the elements B, Al, C and Si, )which element has the highest first ionisation enthalpy ?
(n) which element has the most metallic character?
Justify your answer in each case
13. Be and Ne have positive values of electron gain enthalpy against the general trend in their period in Modern
periodic table. Explain.
14.s
14. Nitrogen has positive electron gain enthalpy whereas oxygen has negative. However, oxygen has lowe
ionisation enthalpy than nitrogen. Explain.
15. Among alkali metals, which element do you expectto be least electronegative?
16.a Explain the following according to Modern periodic table
(a) Electronegativity of elements increase on movingfrom left to right in a period.
(b) lonisation enthalpy decrease in a group from top to bottom.
, EXERCISE 2
CORRECT
TYPE (MAINS)
ONLY ONE OPTION
PARTA: to
table is equal
number in the form of the periodic
long
The period the period
1. number of any element of
(A) magnetic quantum element of the period.
(B) atomic number of any number
the period
any element of the
of
maximum PrincCipal quantum
(C) maximum element of period
Azimuthal quantum number of any
(D) periodic table
is incoret
all the orbitals in a
related to the modern electrons can
occupy
the following statements
2 Which one of has 6columns, because a
maximum of 6
o r b i t a l s in a
A) he P-block electrons c a n
occupy all the
p-subshell because a
maximum of 8
has 8 columns, Subshell
e-DiOCk that can occupy that
electrons
d-subshell. number of received electrons in
columns equal to the that
contains a number of last subshell
Each blockindicates value Azimuthal quantum number ( for the
block of
(D) The
building up the electronic configuration. .
filled in 4f-orbital are called
elements in which electrons are progressively (B)
3. The transition elements
(A) actinoids
(D) halogens
(C) lanthanoids
correct regarding hydrogen
Which following statements is not
ofthe
(A) It resembles halogens in some properties.
some properties.
(B) It resembles alkali metals in table.
be
(C) It can placed in 17th group of Modern periodic
Modern periodic table.
(D) It cannot be placed in 1s group of above and below Ag
numbers of elements placed
number 47. In the same group, the atomic
of Ag is
5. Atomic
in Long form of periodic table will be (D) 39, 65
(B) 39, 79 (C) 29, 79
(A) 29, 65
atomic number Z 118 will be:
=
6. In modern periodic table, the element with
(A) Uuo; Ununoctium alkaline earth metal (B) Uno; Unniloctium; transition metal
(C) Uno; Unniloctium alkali metal (D) Uuo, Ununoctium; noble gas
7. The order of screening effect of electrons of s, p, d and
forbitals of a given shell of an atom on its outer shell
electrons is
(A)s> p>d>f (B)f> d>p>s (C) p < d <s>f (D)f> p>s>d
Which of the following is generally true regarding effective nuclear charge (Ze)
(A) It increases on moving left to right in a period.
(B) It remains almost constant on moving top to bottom in a group
(C) For isoelectronic species, as Z increases, 2 decreases.
(D) Both (A) and (B)
9.2 Among following species which of them have maximum Z
(A) Sn (B) Sn (C) In (D) In
10. From the given set of species, point out the species from each set having highest Ze
(a) O2, F, Na (b) Li, Be, Na (c) He, Li, H
a C a b C
(A) Na 3e Li (B) 0
C) F Na He (D) Na Be He
11. The atomic number of an element which can not show the oxidation state of +3 is-
A) 13 (B) 32 (C) 33 (D) 17
12. The most common oxidation state of an element is-2. The number of electrons present in its outer most
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sameerchoudhary. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
