How many groups and periods are there in periodic table?

How many groups and periods are there in periodic table?
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18 groups and 7 Periods
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(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.

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

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

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.

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

The following shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e.

Description : The following shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e.

Last Answer : a) Select the letter which represents a metal. b) Select the letter which represents a noble gas. a) d b) c

List the short period, long period and incomplete periods in the modern periodic table

Description : List the short period, long period and incomplete periods in the modern periodic table

Last Answer : Periodnumber 1st 2 nd Description Veryshort 8 elements (Li to Ne) Long 18 elements (K to Kr) Very long 32 elements (Cs to Rn) Short 5 Long 4 th 6 th 7th 2 (H & He) Short ... of elements incomplete 8 elements ( Na to Ar) 18 elements (Rb to Xe) Rest of the elements (Fr onwards)

How many groups are there in the periodic table ?

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

Last Answer : There are 18 groups in the periodic table .

Ozone belongs to which groups of the periodic table?

Description : Ozone belongs to which groups of the periodic table?

Last Answer : Ozone belongs to which groups of the periodic table? A. IVA B. VA C. VIA D. VIIA

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

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

Last Answer : Feel Free to Answer

What are the names of the 8 groups in the periodic table?

Description : What are the names of the 8 groups in the periodic table?

Last Answer : alkali metals, alkali earth metals, halogens, noble gases, transition metals and there are only 5 not 8

What are the names of the 8 groups in the periodic table?

Description : What are the names of the 8 groups in the periodic table?

Last Answer : alkali metals, alkali earth metals, halogens, noble gases, transition metals and there are only 5 not 8

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

Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B Elements of Group 16 occur as cations in ionic compounds. C Oxides of elements in Groups 16 and 17 are basic. D The halogens (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

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

Description : Let x1(t) and x2(t) be periodic with fundamental periods T1 and T2 respectively. Under what condition be the sum x(t) = x1(t) + x2(t) be periodic ? (A) Only for T1 = T2 (B) Always periodic (C) For T1/T2 equal to a rational number (D) Not periodic

Last Answer : Let x1(t) and x2(t) be periodic with fundamental periods T1 and T2 respectively. Under what condition be the sum x(t) = x1(t) + x2(t) be periodic ? (A) Only for T1 = T2 (B) Always periodic (C) For T1/T2 equal to a rational number (D) Not periodic

How are groups and periods classified in chemistry?

Description : How are groups and periods classified in chemistry?

Last Answer : answer:The periodic table rocks. While we do not do homework here I want to encourage you to explore it. Each element has a history and unique properties. This is just one of many awesome sites that can help you appreciate and understand the elements.

There are 18 groups and 7 periods

Description : There are 18 groups and 7 periods

Last Answer : in the modern periodic table

For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

Description : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

Last Answer : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

The a-helix of proteins is (A) A pleated structure (B) Made periodic by disulphide bridges (C) A non-periodic structure (D) Stabilised by hydrogen bonds between NH and CO groups of the main chain

Description : The a-helix of proteins is (A) A pleated structure (B) Made periodic by disulphide bridges (C) A non-periodic structure (D) Stabilised by hydrogen bonds between NH and CO groups of the main chain

Last Answer : Answer : C

Nonadherence to therapeutic regimens is a significant problem for which of the following age groups? a) Adults 65 and over Elderly people frequently have one or more chronic illnesses that are managed with numerous medications and complicated by periodic acute episodes, making adherence difficult. b) Teenagers Problems of teenagers, generally, are time limited and specific, and require promoting adherence to treatment to return to health. c) Children In general, the compliance of children depends on the compliance of their parents. d) Middle-aged adults Middle-aged adults, in general, have fewer health problems, thus promoting adherence.

Description : Nonadherence to therapeutic regimens is a significant problem for which of the following age groups? a) Adults 65 and over Elderly people frequently have one or more chronic illnesses that are ... -aged adults Middle-aged adults, in general, have fewer health problems, thus promoting adherence.

Last Answer : a) Adults 65 and over Elderly people frequently have one or more chronic illnesses that are managed with numerous medications and complicated by periodic acute episodes, making adherence difficult.

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.

What alloy is created when you melt and mix all metals on the periodic table in equal portions?

Description : What alloy is created when you melt and mix all metals on the periodic table in equal portions?

Last Answer : You can’t mix them all, their melting points are vastly different.

Do we have (or will have soon) a periodic table of sub-atomic elements?

Description : Do we have (or will have soon) a periodic table of sub-atomic elements?

Last Answer : http://www.bing.com/images/search?q=subatomic+elements+chart&qpvt=sub+atomic+elements+chart&qpvt=sub+atomic+elements+chart&FORM=IGRE ?

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.

What would be some good ideas for a Periodic Table Themed Board Game?

Description : What would be some good ideas for a Periodic Table Themed Board Game?

Last Answer : You could use different brand beverage bottle caps for the pieces and have cards that ask the elements in certain materials with higher points for the more complex answers, and play it like a game of chess. You ... a rook, you get benzene you move like the queen. I'm not sure what makes the king.

Is there a slower version of the periodic table song?

Description : Is there a slower version of the periodic table song?

Last Answer : answer:Are you talking about Tom Lehrer’s “The Elements.” Simply sing it slowly. Here Lehrer’s sings and the lyrics are typed underneath.

When talking about the periodic table, what are the trends of precipitates as you move down the column of alkaline earth metals?

Description : When talking about the periodic table, what are the trends of precipitates as you move down the column of alkaline earth metals?

Last Answer : Homework, eh? :)

Is the Iron in ours bodies the same Iron on the periodic table of the elements?

Description : Is the Iron in ours bodies the same Iron on the periodic table of the elements?

Last Answer : Yep, good ol’ Fe. Here’s the molecular structure of hemoglobin

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.

What element is not on the periodic table? -Riddles

Description : What element is not on the periodic table? -Riddles

Last Answer : The Element of Surprise.

What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements? -Riddles

Description : What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements? -Riddles

Last Answer : The Letter J.

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.

(a) Why do we classify elements? (b) What were the two criteria used by Mendeleev in creating his Periodic Table? ... Justify your answer. -Chemistry 9th

Description : (a) Why do we classify elements? (b) What were the two criteria used by Mendeleev in creating his Periodic Table? ... Justify your answer. -Chemistry 9th

Last Answer : (a) It is done so as to study the properties of elements conveniently. (b) Increasing order of atomic mass and similarities in chemical properties (especially nature and formulae of oxide and hydride formed). ... at that time. (e) They will be kept at same slot as they have same chemical properties.

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.

Which is the basis of modern periodic table? -Do You Know?

Description : Which is the basis of modern periodic table? -Do You Know?

Last Answer : answer:

what is the 110 element of periodic table?

Description : what is the 110 element of periodic table?

Last Answer : DS Darmstadtium

The horizontal rows on the periodic table are called?

Description : The horizontal rows on the periodic table are called?

Last Answer : The horizontal rows are called periods

What is the six element of the periodic table of elements?

Description : What is the six element of the periodic table of elements?

Last Answer : Family six on the Periodic Table of elements is also know asChalcogens

What is the signal of the last element of the periodic table ?

Description : What is the signal of the last element of the periodic table ?

Last Answer : Uuo The last element of the periodic table.

Which is the first element in the periodic table ?

Description : Which is the first element in the periodic table ?

Last Answer : The first element in the periodic table is hydrogen ( H) .

What is the main basis of modern periodic table ?

Description : What is the main basis of modern periodic table ?

Last Answer : The true basis of the modern periodic table is the electron configuration.

How many stages are there in Mendeleev's Periodic Table ?

Description : How many stages are there in Mendeleev's Periodic Table ?

Last Answer : There are 7 stages in Mendeleev's Periodic Table .

In the second and third stages of the periodic table, after how many elements does religion repeat ?

Description : In the second and third stages of the periodic table, after how many elements does religion repeat ?

Last Answer : In the case of the second and third stages of the periodic table, religion repeats itself after the eight elements.

What is the main basis of periodic table ?

Description : What is the main basis of periodic table ?

Last Answer : The electron configuration is the basis of the periodic table.

How many rows are there under the Periodic Table ?

Description : How many rows are there under the Periodic Table ?

Last Answer : Below the periodic table are two rows.

What is a Periodic Table ?

Description : What is a Periodic Table ?

Last Answer : Periodic Table: - The periodic table is a table formed by arranging the elements according to their atomic number with the help of modern periodic formulas .