(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

(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
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1 Answer

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 and II. Therefore, ‘N’ will be smaller than ‘M’ as atomic size goes on decreasing from left to right. ‘M’ is more metallic than ‘N’. Metallic character goes on decreasing from left to right as tendency to lose electrons decreases due to decrease in atomic size. Their valencies are 1 and 2 respectively in forming oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.
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Related questions

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What groups of elements should have very different chemical properties in the periodic table?

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Last Answer : Feel Free to Answer

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Description : How many periods and groups are there in the modern periodic table?

Last Answer : In the modern periodic table there are 7 periods and 18 groups.

What are periods and groups in the modern periodic table?

Description : What are periods and groups in the modern periodic table?

Last Answer : The horizontal rows in the periodic table are called periods. The vertical columns in the periodic table are called groups.

How many groups and periods are there in periodic table?

Description : How many groups and periods are there in periodic table?

Last Answer : 18 groups and 7 Periods

How many groups and periods are found in long form periodic table?

Description : How many groups and periods are found in long form periodic table?

Last Answer : Ans: 7 periods 18 groups

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Description : How does metallic nature vary along a period and down a group?

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Last Answer : (3) molecular state

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

Last Answer : increases.

Write the molecular formulae for the following compounds and name the elements present. (a) Baking soda (b) Common salt (c) Sulphuric acid (d) Nitric acid

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An unknown element is a soft metallic solid. It is highly reactive and has a low melting point. In which group of the periodic table is it most likely to be found?

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The periodic table arranges elements by the number of ____ in their outermost energy levels. a. neutrons c. protons b. atoms d. electrons

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Write the molecular formulae of the third and fifth member of homologous series of carbon compounds represented by the general formula C n H 2n+2

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

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Description : What is valencies of elements?

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Description : What two elements in the periodic table have properties in common with Calcium?

Last Answer : Be, Mg, Ca, Sr, Ba, Ra. All the elements in that column haveproperties similar to each other.

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Let x1(t) and x2(t) be periodic with fundamental periods T1 and T2 respectively. Under what

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In the periodic table does a set of properties repeat from group to group?

Description : In the periodic table does a set of properties repeat from group to group?

Last Answer : No. The properties of elements repeat from row to row (period toperiod).The groups on the table are the columns.

In the periodic table does a set of properties repeat from group to group?

Description : In the periodic table does a set of properties repeat from group to group?

Last Answer : No. The properties of elements repeat from row to row (period toperiod).The groups on the table are the columns.

On the periodic table how many periods are there?

Description : On the periodic table how many periods are there?

Last Answer : Th horizontal rows are referred as periods. There are 7 periods in Periodic Table.

What are the periods in Mendeleev's periodic table?

Description : What are the periods in Mendeleev's periodic table?

Last Answer : Because some of the elements were not yet discovered so he left them blank for other elements to be discovered. -bobby corner

What are the periods in Mendeleev's periodic table?

Description : What are the periods in Mendeleev's periodic table?

Last Answer : Because some of the elements were not yet discovered so he left them blank for other elements to be discovered. -bobby corner

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

In the periodic table of elements, on moving from left to right across a period, the atomic radius – (1) decreases (2) increases (3) remains unchanged (4) does not follow a definite pattern

Description : In the periodic table of elements, on moving from left to right across a period, the atomic radius – (1) decreases (2) increases (3) remains unchanged (4) does not follow a definite pattern

Last Answer : (1) decreases Explanation: The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from ... usually increases while going down a group due to the addition of a new energy level (shell).

In the periodic table of elements, on moving from left to right across a period, the atomic radius (1) decreases (2) increases (3) remains unchanged (4) does not follow a definite pattern

Description : In the periodic table of elements, on moving from left to right across a period, the atomic radius (1) decreases (2) increases (3) remains unchanged (4) does not follow a definite pattern

Last Answer : increases

Statement-I : Elements of oxygen family are not capable of forming `p pi-p pi` bonds with other elements of smaller size like C, N ets Statement-II :

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In what general region of the periodic table is metallic character the greatest?

Description : In what general region of the periodic table is metallic character the greatest?

Last Answer : Need answer

(a). Which is largest in size- Cu+ , Cu+2, Cu and why? (b). which element in the periodic table has the highest ionization enthalpy? (c). Which element is more metallic in the periodic table.?

Description : (a). Which is largest in size- Cu+ , Cu+2, Cu and why? (b). which element in the periodic table has the highest ionization enthalpy? (c). Which element is more metallic in the periodic table.?

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The isomers of a substance must have (a) same chemical properties (b) same molecular weight (c) same structural formula (d) same functional groups

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Last Answer : same molecular weight

List the elements of 15 th group of the periodic table. Name the distinct metals and non-metals of the group.

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Last Answer : Nitrogen and phosphorous are non-metals. Arsenic and Antimony are metalloids, Bismuth is a metal.

What is the number of elements in the zero group of the periodic table ?

Description : What is the number of elements in the zero group of the periodic table ?

Last Answer : The number of elements in the zero group of the periodic table is 6 .

In which group of elements of the modern periodic table are halogen placed ?

Description : In which group of elements of the modern periodic table are halogen placed ?

Last Answer : In which group of elements of the modern periodic table are halogen placed? a. 17 b. 6 c. 4 d. 2

Elements present in the 2nd Group of the Periodic Table are also called ?

Description : Elements present in the 2nd Group of the Periodic Table are also called ?

Last Answer : Ans alkaline earth metals

Name the elements present in the 2nd Group of the Periodic Table:

Description : Name the elements present in the 2nd Group of the Periodic Table:

Last Answer : Ans beryllium, magnesium, calcium, strontium, barium and radium

Which group elements show very low ionization enthalpy in the periodic table?

Description : Which group elements show very low ionization enthalpy in the periodic table?

Last Answer : First group elements (alkali metals) 

Name the elements present in the 2nd Group of the Periodic Table:

Description : Name the elements present in the 2nd Group of the Periodic Table: 

Last Answer : beryllium, magnesium, calcium, strontium, barium and radium. These elements with the exception of beryllium are commonly known as the alkaline earth metals. 

Name the elements present in the 1st Group of the Periodic Table

Description : Name the elements present in the 1st Group of the Periodic Table 

Last Answer :  lithium, sodium, potassium, rubidium, caesium and francium. They are collectively known as the alkali metals.