Q. State Modern Periodic Law. Name the two elements of first period. Q.Two element X, Y and Z belong to 17th group but to 2nd,3rd and 4th period respectively. Number of valence electrons in Y is 7. Find the number of valence electrons in X and Z. Q. How does the metallic character of the elements vary (i) in a group (ii) in a period of the modern periodic table ? Q. Na, Mg, Al and P belong to 3rd period but are placed in first, second, thirteenth and fifteenth group. Number of shells occupied in Mg is three. What is the number of occupied shells in Na, Al and P. Give reason for your answer. Q. What is the number of elements in first , second and third period of the periodic table? Give reason for your answer. Q. Arrange the following elements in the descending order of atomic size and give a reason for your answer. Mg, Cl, P, Ar (Atomic numbers of the above elements are 12, 17, 15, 18 respectively. Q. Mention any two trends exhibited by elements when we go from left to right across the period of periodic table. Q. Given below are the atomic radii of some elements of second period.
Arrange these elements in the increasing order of their atomic number . Give reason for your answer. Q. “Elements in Periodic Table show periodicity of properties” List any four such properties. Q. (a) Atomic number of Mg and Al are 12 and 13 respectively. Write their electronic configuration. (b) Mention the period of the Modern Periodic Table to which the above two elements belong. Give reason for your answer Q. (a) State the Modern periodic law. (b) What is the total number of periods and groups in Modern Periodic Table Q. From the part of a periodic table, answer the following questions
(a) Atomic number of oxygen is 8. What would be the atomic number of, Fluorine ? (b) Out of ‘X’ and ‘Q’ which element has larger atomic size. Give reason for your answer Fluorine. (c) Out of ‘Y’ and ‘Z’ which element has smaller atomic size. Give reason for your answer. Q. (a) Atomic radius of hydrogen is 37pm. Express it in meters. (b) How does atomic size vary in a group and in a period ? Q. (a) What are metalloids ? Write any two examples. (b) Given below are some of the elements of first group Li, Na, K (Their atomic numbers are 3,11,19 respectively and they belong to 2nd 3rd and 4th period respectively) Arrange these in the decreasing order of metallic character exhibited by them. Q. Nitrogen (atomic number 7) and phosphorous (atomic number 15) belong to group 15 of the Periodic Table write the electronic configuration of these two elements. Which of these will be more electronegative and why ? Q. (a) State modern Periodic Law. (b) What are groups and periods in periodic Table? Q. (a) “Silicon is classified as a metalloid.” Justify this classification. (b) Name two more such metalloids. (c) In which part of the Periodic Table we can look for metalloids. On which side of these we can get non- metals ? Q. The following table shows the positions of six elements A, B, C,D,E and F in the modern periodic table
(a) Which element will form only covalent compounds ? (b) Which element is a metal with valency two ? (c) Out of D and E , which one has a bigger atomic radius ? Give reason for your answers. Q. State the modern periodic law. How many groups and periods are there in the modern periodic table Q. Out of the two elements X and Y which has bigger atomic radius ? Give reason to justify your answer. (i) X has atomic number 18 and atomic mass 40 (ii) Y has atomic number 20 and atomic mass 40 Q. Given below is a part of the periodic table.
(a) What happens to the atomic size? Justify your answer. (b) what happens to the metallic character of the elements ? (b) (i) Take about 3mL of Ethanol in a test tube and warm it gently in a water bath. (ii) Add a 5% solution of alkaline potassium permanganate drop by drop to the solution. (iii) What happens to the colour of KMnO4 added initially and then in excess? Give reason. Name the product of this reaction. Q. (a) How does the tendency to gain electrons change as we go down a group ? Give reason. (b) Given below is a part of the periodic table. How does the valency vary, as we move vertically downward from Li to Fr. Give reason?
Q. The electronic configuration of three elements X, Y and Z are given below.
(i) Which element belongs to the second period ? (ii) Which element belongs to the eighteenth period ? (iii) Which element belongs to the second group? (iv) What is the valency of Y ? (v) Y and Z, are they metal or a non – metal ? Q. (a) Element „Y‟ with atomic number 3 combines with element „A‟ with atomic number 17, what would be the formula of the compound ? (b) What is electronic configuration of element with atomic number 10 ? What will be its valency ?
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36 Comments
kartik
17/11/2014 12:50:41 pm
Periodic classification class 10Questions from: SUMMATIVE ASSESSMENT – II
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Abhishek kumar
22/7/2016 11:32:51 pm
abby kuch to bol
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archiee
1/1/2016 11:13:26 pm
cool
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priya goyal
28/2/2016 08:43:39 pm
qustion can not be cool .........idiot
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ak
22/10/2016 01:17:10 pm
idiot wat do u mean
Sumit kumar sinha
29/12/2017 07:42:04 pm
Bhak nai
special girl
28/2/2016 08:45:19 pm
aap kha se ho ..... ? girl or boy
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aaa
31/1/2016 07:36:37 pm
nice
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chirag soni
26/2/2016 11:57:08 am
helpful
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raju
27/2/2016 06:49:56 pm
interesting lol:)
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lara
28/2/2016 08:27:23 pm
its very helpful for me
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cooooooooool
28/2/2016 08:42:31 pm
oh great
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shreesha
29/2/2016 03:36:23 pm
nice questions
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dgsdh
29/2/2016 09:04:11 pm
goos
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sharadha
29/2/2016 09:06:37 pm
awesome
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1/3/2016 07:27:07 pm
WoW .... !!! its vry helpfull .. .. gud wrk ... :) keep wrking
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anshika diwakar
16/3/2016 11:08:26 pm
it is quite fine but it should have answers also
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maaz
18/10/2016 08:20:31 pm
nice one quite helpful
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satya bisht
19/12/2016 06:35:42 pm
it is good chapter of student learning
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mmm
14/2/2017 11:23:23 pm
yaak
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Anshu
5/3/2017 06:20:48 pm
Should have answers too
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A
10/3/2017 09:11:48 pm
Wow😊
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Rahul
7/6/2017 09:46:10 am
Thanks
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Avie
23/12/2017 12:05:50 pm
Great bro..... or sis whoever has published it
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Pratham
29/12/2017 09:10:24 pm
In question number 2 : there is a mistake there should be 'Three' instead of 'Two' elements....... Pls correct that.
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Aarushi
17/2/2018 02:16:40 pm
It's very helpful and very important questions are there thx for such an important help
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Dishoo
24/2/2018 12:54:34 pm
very interesting question and they are very much helpful
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Sunil
1/3/2018 06:14:07 pm
Nice
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16/6/2018 09:50:01 pm
It is not good it should haha more questions and with answers.
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