In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The element with atomic number 57 belongs toA. s-blockB. p-blockC. d-blockD. f-block

In the modern periodic table, elements are arranged in order of increa

1.	In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The element with atomic number 57 belongs toA. s-blockB. p-blockC. d-blockD. f-block
Answer» Correct Answer - C

Discussion

No Comment Found

Related InterviewSolutions

In sodium atom on `3s` electron the screening is due to:A. `3s^(2),3p^(6)`B. `4s^(1)`C. `1s^(2),2s^(2),2p^(6)`D. `3s^(1)`
What is correct order of reducing capacity.A. `Ge^(2+) gt Sn^(2+) gt Pb^(2+)`B. `Ge^(2+) lt Sn^(2+) lt Pb^(2+)`C. `Ge^(2+) ~~ Sn^(2+) ~~ Pb^(2+)`D. `Pb^(2+) gt Ge^(2+) gt Sn^(2+)`
Which of the following elements can heve negative oxidation states.A. `AI`B. `Ca`C. `Fe`D. `B`
The oxidation number that iron does not exhibit in its common compounds or in its elemental state is:
Which can have both +ve and -ve oxdiation states in their compoundsA. `F`B. `I`C. `Na`D. `AI`
Which metal exhibits more than one oxidation states in their compoundsA. `Na`B. `Mg`C. `AI`D. `Fe`
The prperties which are not common to both groups 1 and 17 elements in the p-periodic table are:A. Electropositive character increase down the groups.B. Reactivity decrease from top to bottom in these groups.C. Atomic radii increase as the atomic number increase. D. Electronegativity decreases on moving down the group
Which of the following compounds are found to exist (General formula obtaining)?A. `MgF`B. `Cu_(2)CI_(2)`C. `NaF_(2)`D. `K_(2)O`
The prperties which are not common to both groups 1 and 17 elements in the p-periodic table are:A. Electropositive character increase down the groups.B. Reactivity decrease from top to bottom in these groups.C. Atomic radii increase as the atomic number increase.D. Electronegativity decreases on moving down the group
Electron affinity is the `:`A. Energy absorbed when an electron is added to an isolated atom in the gaseous stateB. Energy released when an electron is added to an isolated atom in the gasesou stateC. Energy required to take out an electron from an isolated gaseous atomD. Power of an atom to attract an electron to itself.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment