Classification of Elements and Periodicity in Properties Test

Result

Classification of Elements and Periodicity in Properties Test - 44

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Identify the correct ground state electron configuration for $$Cr$$.

A
$$[Ar] 3s^23d^4$$

B
$$[Ar]3s^2 3d^5$$

C
$$[Ar] 4s^2 3d^5$$

D
$$[Ar] 4s^2 3d^4$$

E
$$[Ar] 4s^1 3d^5$$

Solution

The expected ground state electron configuration for $$Cr (Z=24)$$ is $$[Ar] 4s^2 3d^4$$. But the observed ground state electron configuration is $$[Ar] 4s^1 3d^5$$. This is due to extra stability of half filled 3d and 4s subshells.
Question 2
1 / -0

What is the atomic number of the element Ununnilium?

A
$$199$$

B
$$191$$

C
$$119$$

D
$$110$$
Solution
Number Root
0 nil
1 un
2 bi
3 tri
4 quad
5 pent
6 hex
7 sept
8 oct
9 enn
1. The name is derived directly from the atomic number of the element using the above Latin numerical roots.
2. The roots are put together in the order of the digits which make up the atomic number and terminated by 'ium' to spell out the name. The final 'n' of 'enn' is elided when it occurs before 'nil', and the final 'i' of 'bi' and of 'tri' when it occurs before 'ium'.
3. The symbol of the element is composed of the initial letters of the numerical roots which make up the name.
4. The root 'un' is pronounced with a long 'u', to rhyme with 'moon'. In the element names each root is to be pronounced separately.
Question 3
1 / -0

What is the symbol of atomic number 117 ?

A
Uus

B
Uns

C
Uno

D
Uut
Solution
Number Root
0 nil
1 un
2 bi
3 tri
4 quad
5 pent
6 hex
7 sept
8 oct
9 enn
1. The name is derived directly from the atomic number of the element using the above Latin numerical roots.
2. The roots are put together in the order of the digits which make up the atomic number and terminated by 'ium' to spell out the name. The final 'n' of 'enn' is elided when it occurs before 'nil', and the final 'i' of 'bi' and of 'tri' when it occurs before 'ium'.
3. The symbol of the element is composed of the initial letters of the numerical roots which make up the name.
4. The root 'un' is pronounced with a long 'u', to rhyme with 'moon'. In the element names each root is to be pronounced separately.
5. Element with atomic number 117 is named as Ununseptium (Uus).
Question 4
1 / -0

Within a period __________ have the largest electron affinities.

A
halogens

B
actinides

C
transition metals

D
group 1A alkali metals

Solution

Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. Within a period elements have the largest electron affinities are halogens.

Question 5

1 / -0

Consider the table below, showing several properties of four representative elements, potassium, calcium, sulfur, and chlorine, all from period $$4$$ of the periodic table. Notice that the ionization energies of the nonmetals and the electron affinities of the metals have not bee included.

Atom	Ionization Energy $$\left (\dfrac {kJ}{mol}\right )$$	Electron Affinity $$\left (\dfrac {kJ}{mol}\right )$$	Atomic Radius (pm)	Most Stable Ion	Ionic Radius (pm)
$$K$$	$$419$$	N/A	$$227$$	$$K^{+}$$	$$133$$
$$Ca$$	$$(1) 589$$ $$(2) 1145$$	N/A	$$197$$	$$Ca^{2+}$$	$$99$$
$$S$$	N/A	$$(1) - 201$$ $$(2) + 532$$	$$104$$	$$S^{2-}$$	$$184$$
$$Cl$$	N/A	$$-348$$	$$99$$	$$Cl^{-}$$	$$181$$

Note: $$1 pm = 10^{-10}cm$$
Which of the four compounds listed would have the least exothermic lattice energy?

$$KCl$$

$$K_{2}S$$

$$MgCl_{2}$$

$$MgS$$

Solution

A compound has least exothermic lattice energy if it has a cation of lower ionisation energy and anion of of higher negative electron affinity. Because, on adding these energies, the total will become less value. So cation of lower ioisation energy =K.

Anion of higher negative electron affinity = Cl.

Compound=KCl.

Question 6
1 / -0

Elements in the same column/group of the periodic table have similar chemical properties because their atoms have the same_________.

A
number of protons.

B
number electrons.

C
number of valence electrons.

D
atomic mass.

Solution

The elements of same group have similar chemical properties because they have same number of valence electrons. For eg: Li has $$1$$ valence electron and so does $$NA,K$$ and $$Cs$$. Hence they have similar properties.
Question 7
1 / -0

Which term describes the tendency of elements to participate in a chemical change process?

A
Ionic radius

B
Reactivity

C
Ionization enthalpy

D
Atomic radius

Solution

The tendency of element to participate in a chemical change process is called as reactivity of element. Higher tendency is indicated by higher reactivity.
Question 8
1 / -0

In chemistry lab class, your teacher asks you to find magnesium oxide, $$MgO$$, to use in the experiment. When you go to the stockroom, you realized there is no magnesium oxide available.
Which of the following would be the most suitable replacement?

A
Sodium oxide, $$Na_{2}O$$

B
Calcium oxide, $$CaO$$

C
Carbon dioxide, $$CO_{2}$$

D
Silicon dioxide, $$SiO_{2}$$

Solution

$$Mg$$ is a s block metal. It is placed above to $$Ca$$ in the periodic table. So it has similar properties as of $$Mg$$. Also from the given option, $$CaO$$ is the only s-block metals oxide. So it most closely resembles properties of $$MgO$$. Hence most suitable replacement of $$MgO$$ would be Calcium Oxide $$CaO$$ (option B)
Question 9
1 / -0

What would be the IUPAC name of element with a atomic number 120?

A
Unbinilium

B
Unnilhexium

C
Unnilseptium

D
Ununnilium
Solution
Number Root
0 nil
1 un
2 bi
3 tri
4 quad
5 pent
6 hex
7 sept
8 oct
9 enn
1. The name is derived directly from the atomic number of the element using the above Latin numerical roots.
2. The roots are put together in the order of the digits which make up the atomic number and terminated by 'ium' to spell out the name. The final 'n' of 'enn' is elided when it occurs before 'nil', and the final 'i' of 'bi' and of 'tri' when it occurs before 'ium'.
3. The symbol of the element is composed of the initial letters of the numerical roots which make up the name.
4. The root 'un' is pronounced with a long 'u', to rhyme with 'moon'. In the element names each root is to be pronounced separately.
Question 10
1 / -0

What is the IUPAC symbol for Mendelevium ?

A
Md

B
Mn

C
Me

D
Mv

Solution

Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Number	Root
0	nil
1	un
2	bi
3	tri
4	quad
5	pent
6	hex
7	sept
8	oct
9	enn

Number	Root
0	nil
1	un
2	bi
3	tri
4	quad
5	pent
6	hex
7	sept
8	oct
9	enn

Number	Root
0	nil
1	un
2	bi
3	tri
4	quad
5	pent
6	hex
7	sept
8	oct
9	enn

Classification of Elements and Periodicity in Properties Test - 44

Result

Classification of Elements and Periodicity in Properties Test - 44

Score

-

Rank

-

SHARING IS CARING

Question 1

$$[Ar] 3s^23d^4$$

$$[Ar]3s^2 3d^5$$

$$[Ar] 4s^2 3d^5$$

$$[Ar] 4s^2 3d^4$$

$$[Ar] 4s^1 3d^5$$

Solution

Question 2

$$199$$

$$191$$

$$119$$

$$110$$

Solution

Question 3

Uus

Uns

Uno

Uut

Solution

Question 4

halogens

actinides

transition metals

group 1A alkali metals

Solution

Question 5

$$KCl$$

$$K_{2}S$$

$$MgCl_{2}$$

$$MgS$$

Solution

Question 6

number of protons.

number electrons.

number of valence electrons.

atomic mass.

Solution

Question 7

Ionic radius

Reactivity

Ionization enthalpy

Atomic radius

Solution

Question 8

Sodium oxide, $$Na_{2}O$$

Calcium oxide, $$CaO$$

Carbon dioxide, $$CO_{2}$$

Silicon dioxide, $$SiO_{2}$$

Solution

Question 9

Unbinilium

Unnilhexium

Unnilseptium

Ununnilium

Solution

Question 10

Md

Mn

Me

Mv

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.