The periodic table is divided into 4 main blocks: they are?

Description : The action ‘STACK(A, B)’ of a robot arm specify to _______________ a) Place block B on Block A b) Place blocks A, B on the table in that order c) Place blocks B, A on the table in that order d) Place block A on block B

Last Answer : d) Place block A on block B

................. maintains the list of free disk blocks in the Unix file system. (A) I-node (B) Boot block (C) Super block (D) File allocation table

Description : ................. maintains the list of free disk blocks in the Unix file system. (A) I-node (B) Boot block (C) Super block (D) File allocation table

Last Answer : (C) Super block

A virtual memory has a page size of 1K words. There are eight pages and four blocks. The associative memory page table contains the following entries: Image Which of the following list of virtual addresses (in decimal) will not cause any page fault if referenced by the CPU? (A) 1024, 3072, 4096, 6144 (B) 1234, 4012, 5000, 6200 (C) 1020, 3012, 6120, 8100 (D) 2021, 4050, 5112, 7100

Description : A virtual memory has a page size of 1K words. There are eight pages and four blocks. The associative memory page table contains the following entries: Which of the following list of virtual addresses (in ... 1234, 4012, 5000, 6200 (C) 1020, 3012, 6120, 8100 (D) 2021, 4050, 5112, 7100

Last Answer : Answer: C Explanation: The pages which are not in main memory are: 1020 will not cause page fault (1024-2047) 3012 will not cause page fault (3072-4095) 6120 will not cause page fault (4096-5119) 8100 will not cause page fault (6144-7167)

A sulphate salt of group 2 element of the periodic table is white ,soft substance which can be moulded into different shapes by making its dough.Identify the salt . (a) CaSO4.1/2 H2O (b) CaSO4.2H2O (c) 2CaSO4. 1⁄2 H2O (d)CaSO4

Description : A sulphate salt of group 2 element of the periodic table is white ,soft substance which can be moulded into different shapes by making its dough.Identify the salt . (a) CaSO4.1/2 H2O (b) CaSO4.2H2O (c) 2CaSO4. 1⁄2 H2O (d)CaSO4

Last Answer : (a) CaSO4.1/2 H2O

a. 1s^2 b. 1s^22s^22p^6 In which group and period of the periodic table they are placed?

Description : a. 1s^2 b. 1s^22s^22p^6 In which group and period of the periodic table they are placed?

Last Answer : The electronic configuration of some elements are given below : a. 1s2 b. 1s22s22p6 In ... and period of the periodic table they are placed?

Magnesium and calcium are in the same group on the periodic table. Which sentence best explains why they have similar properties?

Description : Magnesium and calcium are in the same group on the periodic table. Which sentence best explains why they have similar properties?

Last Answer : C. They both have two......

Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk service are not influenced by file allocation method. (C) Caching the directories and index blocks in main memory can also help in reducing disk arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Description : Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk ... arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

Last Answer : (B) The number of requests for disk service are not influenced by file allocation method.

What is the periodic table of elements?

Description : What is the periodic table of elements?

Last Answer : Answer: The periodic table of elements is a chart that arranges all known chemical elements in order of increasing atomic number, based on their electron configurations and chemical properties. ... as it allows scientists to predict the properties and behavior of different elements and compounds.

Do chemists have to memorize all the elements of the periodic table?

Description : Do chemists have to memorize all the elements of the periodic table?

Last Answer : answer:I don't see why they would have to , since most chemists don't work with all elements. On the other hand, just like readers memorized the alphabet and how to spell and ... have similar properties to each other, as well as isotopes of each. Familiarity sometimes breeds more familiarity.

why is the periodic table symbol for sodium, Na ?

Description : why is the periodic table symbol for sodium, Na ?

Last Answer : Many of them, like lead (Pb) are named after their latin roots.

(a) What are ‘groups’ and ‘periods’ in the ‘periodic table’? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic table. How do the following properties of M and N vary? Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science

Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science

Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.

a) What is meant by periodicity in properties of elements with reference to the periodic table? (b) Why do all the elements of the same group have similar properties? (c) How will the tendency to gain electrons change as we go from left to right across a period? Why? -Science

Description : a) What is meant by periodicity in properties of elements with reference to the periodic table? (b) Why do all the elements of the same group have similar properties? (c) How will the tendency to gain electrons change as we go from left to right across a period? Why? -Science

Last Answer : (a) The repetition of same properties after definite interval is called periodicity in properties. (b) It is because they have same valence electrons therefore, have similar properties. (c) ... to right in a period because atomic size goes on decreasing and effective nuclear charge increases.

State Mendeleev’s periodic law. Write two achievements of Mendeleev’s periodic table -Science

Description : State Mendeleev’s periodic law. Write two achievements of Mendeleev’s periodic table -Science

Last Answer : Mendeleevs Periodic Law: Properties of elements are the periodic function of their atomic masses. Achievements:i It could classify all the elements discovered at that time. ii It helped in the discovery of new elements. iii it helped in the correction of the atomic mass of some of the elements.

The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Description : The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Last Answer : (a) Sodium is bigger than magnesium as it has lesser nuclear charge so there is less force of attraction between nucleus and valence electrons and less effective nuclear charge. It is, therefore, ... the most non-metallic element because it can gain electrons easily due to its smallest atomic size.

1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science

Description : 1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science

Last Answer : a) It is because nuclear charge increases due to increase in atomic number, therefore, force of attraction between nucleus and valence electrons increases, i.e. effective nuclear charge increases, hence ... element is ‘F’ because it can gain electrons easily due to smallest atomic size.

The names of the scientists, Newlands, Mendeleev and Meyer are associated with the development of (a) Atomic structure (b) Metallurgy (c) Periodic table of elements (d) Discovery of elements

Description : The names of the scientists, Newlands, Mendeleev and Meyer are associated with the development of (a) Atomic structure (b) Metallurgy (c) Periodic table of elements (d) Discovery of elements

Last Answer : Ans:(c)

Which period have the largest number of elements in the periodic table?

Description : Which period have the largest number of elements in the periodic table?

Last Answer : The sixth period

Where are the Largest atoms seen at the periodic table?

Description : Where are the Largest atoms seen at the periodic table?

Last Answer : Bottom left

Where are the smallest atoms seen at the modern periodic table?

Description : Where are the smallest atoms seen at the modern periodic table?

Last Answer : Right hand top

How many groups are there in the mod- ern periodic table?

Description : How many groups are there in the mod- ern periodic table?

Last Answer : Eighteen

The vertical columns of the periodic table are called

Description : The vertical columns of the periodic table are called

Last Answer : Groups

Modern periodic table was developed by?

Description : Modern periodic table was developed by?

Last Answer : Henry Moseley

The horizontal rows of elements in the periodic table are called?

Description : The horizontal rows of elements in the periodic table are called?

Last Answer : Periods

1st noble gas group in the periodic table?

Description : 1st noble gas group in the periodic table?

Last Answer : Helium

First element in the periodic table?

Description : First element in the periodic table?

Last Answer : Hydrogen

Total number of elements in periodic table?

Description : Total number of elements in periodic table?

Last Answer : 118

The longest period of the periodic table?

Description : The longest period of the periodic table?

Last Answer : Sixth period

The shortest period of the periodic table?

Description : The shortest period of the periodic table?

Last Answer : First period

The right side of the periodic table de- notes?

Description : The right side of the periodic table de- notes?

Last Answer : Non-metals

The left side of the periodic table de- notes?

Description : The left side of the periodic table de- notes?

Last Answer : Metals

Columns are periodic table called?

Description : Columns are periodic table called?

Last Answer : Groups

The rows in periodic table are called?

Description : The rows in periodic table are called?

Last Answer : Periods

Modern periodic table was discovered by?

Description : Modern periodic table was discovered by?

Last Answer : Henry Moseley

The periodic table was discovered by?

Description : The periodic table was discovered by?

Last Answer : Dmitri Ivanovich Mendeleev

Modern periodic table contains?

Description : Modern periodic table contains?

Last Answer : 7 horizontal rows and 18 vertical columns

The modern periodic table is based on?

Description : The modern periodic table is based on?

Last Answer : atomic number

Moseley's periodic table was based on the?

Description : Moseley's periodic table was based on the?

Last Answer : atomic number of elements

Mendeleev's periodic table was based on?

Description : Mendeleev's periodic table was based on?

Last Answer : increasing order of atomic mass

On going down in a group in the periodic table, the metallic nature of element

Description : On going down in a group in the periodic table, the metallic nature of element

Last Answer : increases.

The incomplete period in the periodic table is

Description : The incomplete period in the periodic table is

Last Answer : seventh period.

The longest period in the periodic table is

Description : The longest period in the periodic table is

Last Answer : sixth period

The shortest period in the periodic table is

Description : The shortest period in the periodic table is

Last Answer : first period.

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

Description : In the modern periodic table, the elements are arranged in the ascending order of their

Last Answer : atomic number.

The element which is the most reactive of all elements in the periodic table is

Description : The element which is the most reactive of all elements in the periodic table is

Last Answer : fluorine.

The vertical columns of periodic table are called

Description : The vertical columns of periodic table are called

Last Answer : groups.

The horizontal rows of periodic table are called

Description : The horizontal rows of periodic table are called

Last Answer : periods.

nishant sawant · Answer 1 · 2021-12-13T05:49:26+0000

block - elements of group 1 and 2; P block - ele-
ments of group 13to 18; D block - elements of group 3
to 12; F block - Lanthanides and Actinides

The periodic table is divided into 4 main blocks: they are?

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