Classification of Elements and Periodicity in Properties Test

Result

Classification of Elements and Periodicity in Properties Test - 1

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

The third period (n = 3) begins at sodium with addition of first electron to

A
3p orbital

B
2s orbital

C
2p orbital

D
3s orbital

Solution

Explanation:

The electronic configuration of sodium is 1s² 2s² 2p⁶ 3s¹. The valence electron is in 3s orbital.
Question 2
1 / -0

Electronic configuration of an element is:

A
The distribution of electrons into spin state of an atom

B
The distribution of electrons into different atomic orbitals.

C
The distribution of electrons into magnetic states of an atom

D
The distribution of electrons into azimuthal orbitals of an atom only

Solution

Explanation:

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.
Question 3
1 / -0

According to IUPAC nomenclature,element Ununnillium have an atomic number of:

A
109

B
111

C
108

D
110

Solution

Explanation:

un=1 nil=0 So 110 = ununnilium.
Question 4
1 / -0

Atomic number of element Unnilhexium is:

A
110

B
105

C
107

D
106

Solution

Explanation:

un=1 Nil=0 Hex=6 So 106=uninilhexium.
Question 5
1 / -0

Choose one of the following in the order of increasing radii:

A
I⁺< I^- < I

B
I < I⁺< I^-

C
I^- < I⁺< I

D
I^- > I > I⁺

Solution

Explanation:

Size of anion is greater than the size of parent atom and size of cation. As the –ve charge of anion increases ionic radii increases due to decrease in the effective nuclear charge and vice versa.
Question 6
1 / -0

According to the recommendation of International Union of Pure and Applied Chemistry (IUPAC), the groups in the modern periodic table are numbered from

A
1 to 10

B
1 to 12

C
1 to 8

D
1 to 18

Solution

Explanation:

The groups are numbered from 1 to 18; where group 1 is alkali metal group and group 18 is for the noble gases.
Question 7
1 / -0

In the modern periodic table

A
The horizontal rows are called periods and the vertical columns, series.

B
The horizontal rows are called periods and the vertical columns, groups.

C
The horizontal rows are called groups and the vertical columns, periods

D
The horizontal rows are called series and the vertical columns, groups.

Solution

Explanation:

In modern periodic table, the elements are arranged in the increasing order of their atomic number. It contains 7 horizontal rows called periods and 18 vertical columns called groups.
Question 8
1 / -0

It is now recognized that the ‘Modern Periodic Law’ is essentially the consequence of

A
periodic variation in chemical properties

B
periodic variation in electronic configurations

C
periodic variation in chemical bonds

D
periodic variations in the element lattice

Solution

Explanation:

Modern Periodic Law of element may be defined as the Physical and chemical properties of the elements are periodic functions of their atomic numbers.It means, when the elements are arranged in the order of their increasing atomic numbers, it is observed that the elements of similar properties recur at regular intervals or periodically. As a result of this, the elements fall in certain groups and lead to an arrangement called the modern periodic table of elements. It must be noted that elements are arranged in the periodic table in order of atomic numbers because atomic number is the most fundamental property of an element. The systematic arrangement of elements in modern periodic table according their atomic number helps in justification of isotopes of elements at one place.
Question 9
1 / -0

Mendeleev proposed that some of the elements were still undiscovered and, therefore, left several gaps in the table. He left the gap under aluminium and a gap under silicon, and called these elements Eka-Aluminium and Eka-Silicon. These were later discovered and named

A
Gallium and Germanium respectively

B
Barium and Germanium respectively

C
Mendelivium and Germanium respectively

D
Gallium and Godolinium respectively

Solution

Explanation:

Mendeleev arranged the elements according to their atomic weights. He corrected the atomic weights of few exisiting elements to explain their chemical and physical behaviour. Moreover, he felt that few elements are still to be discovered, so he left empty spaces for them in his periodic table. Two such elements whose properties he predicted; and were later discovered are Gallium and Germanium respectively.
Question 10
1 / -0

Mendeleev relied on the similarities in the empirical formulas and properties of the compounds formed by the elements. He realized that some of the elements did not fit in with his scheme of classification if the order of atomic weight was strictly followed. He therefore

A
amended the periodic law

B
placed the elements with similar properties together

C
placed the elements with same atomic number together

D
placed the elements with same atomic weight together

Solution

Explanation:

Mendeleev placed the elements with similar properties together

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Classification of Elements and Periodicity in Properties Test - 1

Result

Classification of Elements and Periodicity in Properties Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

3p orbital

2s orbital

2p orbital

3s orbital

Solution

Question 2

The distribution of electrons into spin state of an atom

The distribution of electrons into different atomic orbitals.

The distribution of electrons into magnetic states of an atom

The distribution of electrons into azimuthal orbitals of an atom only

Solution

Question 3

109

111

108

110

Solution

Question 4

110

105

107

106

Solution

Question 5

I+ < I- < I

I < I+ < I-

I- < I+ < I

I- > I > I+

Solution

Question 6

1 to 10

1 to 12

1 to 8

1 to 18

Solution

Question 7

The horizontal rows are called periods and the vertical columns, series.

The horizontal rows are called periods and the vertical columns, groups.

The horizontal rows are called groups and the vertical columns, periods

The horizontal rows are called series and the vertical columns, groups.

Solution

Question 8

periodic variation in chemical properties

periodic variation in electronic configurations

periodic variation in chemical bonds

periodic variations in the element lattice

Solution

Question 9

Gallium and Germanium respectively

Barium and Germanium respectively

Mendelivium and Germanium respectively

Gallium and Godolinium respectively

Solution

Question 10

amended the periodic law

placed the elements with similar properties together

placed the elements with same atomic number together

placed the elements with same atomic weight together

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.

I⁺< I^- < I

I < I⁺< I^-

I^- < I⁺< I

I^- > I > I⁺