Science
Class 10
NCERT
1
Chapter 1: Chemical Reactions and Equations
34 questions
2
Chapter 2: Acid,Bases and Salts
39 questions
3
Chapter 3: Metals and Non-metals
38 questions
4
Chapter 4: Carbon and its Compound
24 questions
5
Chapter 5: Periodic Classification of Elements
30 questions
Q1
What were the limitations of the dobereiners' Classification?
Q2
Which element has:
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2,8,2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2,8,2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
Q3
Name
(a) three elements that have a single electron in their outermost shells.
(b) two elements that have two electrons in their outermost shells.
(c) three elements with filled outermost shells.
View all question6
Chapter 6: Life Processes
13 questions
7
Chapter 7: Control and Coordination
12 questions
8
Chapter 8: How do Organism Reproduce?
11 questions
9
Chapter 9: Heredity and Evolution
12 questions
10
Chapter 10: Light -Reflection and Refraction
34 questions
11
Chapter 11: The Human Eye and Colourful World
18 questions
12
Chapter 12: Electricity
49 questions
13
Chapter 13: Magnetic Effects of Electric Current
39 questions
14
Chapter 14: Sources of Energy
24 questions
15
Chapter 15: Our Environment
9 questions
16
Chapter 16: Sustainable Management of Natural Resources
7 questions
Question
Medium
Solving time: 3 mins
Which element has:
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2,8,2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
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Text solution
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(a) two shells, both of which are completely filled with electrons: Only noble gas elements has completely filled orbitals. has two shells, both of which are completely filled with electrons.
(b) The element with electronic configuration has atomic number . The element is Magnesium.
(c) A total of three shells, with four electrons in its valence shell. The electronic configuration is . Atomic number. Element is Silicon.
(d) A total of two shells, with three electrons in its valence shell. electronic configuration is Atomic number . The element is Boron.
(e) Twice as many electrons in its second shell as in its first shell. The first shell can have maximum electrons. Therefore the electrons in second shell . Atomic number is . The element is Carbon.
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Practice more questions from Science (NCERT)
Q1
What were the limitations of the dobereiners' Classification?
Q2
Which element has:
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2,8,2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2,8,2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
Q3
Name
(a) three elements that have a single electron in their outermost shells.
(b) two elements that have two electrons in their outermost shells.
(c) three elements with filled outermost shells.
View allPractice questions from Science (NCERT)
Question 1
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Practice more questions from Periodic Classification of Elements
Question 1
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(a)Write its electronic configuration.
(b)State the group to which ' ' belongs?
(c) ' ' a metal or a non-metal?
(d) White the formula of its bromide?
Question 2
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Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
Question 4
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(a) State modern periodic law.
(b) How does the electronic configuration of the atom of an element relate to its position in the modern periodic table?
(c) How could the modern periodic law remove various anomalies of Mendeleev's periodic table? Explain with examples.
(d) Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
(e) Name the scientist who prepared modern periodic table.
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| Question Text | Which element has: (a) two shells, both of which are completely filled with electrons? (b) the electronic configuration 2,8,2? (c) a total of three shells, with four electrons in its valence shell? (d) a total of two shells, with three electrons in its valence shell? (e) twice as many electrons in its second shell as in its first shell? |
| Updated On | May 8, 2022 |
| Topic | Periodic Classification of Elements |
| Subject | Science |
| Class | Class 10 |
| Answer Type | Text solution:1 Video solution: 2 |
| Upvotes | 155 |
| Avg. Video Duration | 4 min |
