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NCERT Solutions for Class 10 English Updated for

Online view is also being provided for the convenience of students. Modern Lorem lpsum 317 boatplans/boat-sale/boat-slips-for-sale-racine-wi-100 Just click for source Law : the physical and chemical properties of elements are the function soluyions their atomic numbers. As the effective nuclear charge on the valence electrons in the metals is comparatively less, they have tendency to form cations.

Fluorine atom is smaller than chlorine atom as it has less number 2 of shells compared to that in chlorine shells 3. Isotopes are the elements having similar chemical properties but different atomic masses. For example, argon with atomic mass of 40 comes before potassium with atomic mass Iodine at. For example, copper, silver and gold are placed in the same group with alkali metals. Mercury, lead and barium which possess similar properties fall into different groups.

Question 2: Mention the position of i hydrogen and ii isotopes of same element in the modern periodic table. Answer 2: i Hydrogen is placed at ncerg top of group IA. Question 1: Why is atomic number of an element more important to a chemist than its atomic mass? Or Atomic number is considered to be a more appropriate parameter than atomic mass for classification of elements in a periodic table. Answer 1: The properties of element depend upon the number of electrons present in the valence shell which are related to atomic number.

Thus the properties of different elements can be compared if we know their atomic numbers. On the other hand, atomic mass can in no way ncert solutions class 10th chemistry chapter 5 english the chemical properties of elements, because is does not vary regularly with gradation in the chemical properties of elements.

Justify your answer in each case. Answer 2: a Electronic configuration of X is 2, 8, 8, 2. Its valency is ncert solutions class 10th chemistry chapter 5 english. It belongs to group 2 and can lose 2 electrons easily. Since valency of Y is -2 2, 6. Question 3: The element Li, Na and K, each Ncert Solutions Of Class 10th Geography Chapter 5 English having one valence electron, are chemustry period 2, 3 solutiond 4 respectively of Modern Periodic Table. Give reason to justify your answer solutilns each case.

Answer 3: a Group 1. These all have one valency. Its outermost englih is very near ncert solutions class 10th chemistry chapter 5 english the nucleus and so removal of electron is a little difficult. It occupies three shells. Download Offline Solutions Apps to use without internet, free of cost.

Write two reasons responsible for the late discovery of noble gases. State Modern Periodic Law. What is the Modern Periodic Table called? Metals have tendency to form cations. Why is Fluorine atom ncert solutions class 10th chemistry chapter 5 english than chlorine atoms? Given reason why Non-metals have tendency to gain electrons? Important Questions on 10th Science Chapter 5 What property do all elements in the same column of the Periodic Table as boron have in common?

All the elements in the same column as boron have the same number of valence electrons 3. Hence, they all have valency equal Ncert Solutions For Class 10th English Chapter 3 English to 3. What property do all elements in the same column of the Periodic Table as fluorine have in common? All the elements in the same column as fluorine have the Lorem lpsum 317 boatplans/dinghy/fishing-dinghy-for-sale-uk-quote click to see more number of valence electrons 7. Hence, they all have valency equal to 1. How does the electronic configuration of an atom relate to its position in the Lorem lpsum 317 boatplans/wooden-boat/best-wooden-model-boat-kits-quotes Best wooden boat quotes Periodic Table?

In the modern periodic table, atoms with similar chaptsr configurations are placed in the same column. In a group, the number of valence electrons remains the. Elements across a period show an increase in the number of valence electrons. In the Modern Periodic Table, calcium atomic number 20 is surrounded by elements with atomic numbers 12, 19, 21, and Which of these have physical and chemical properties resembling calcium?

The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons 2. Only few triads were. It was applicable up to calcium. The properties of the elements listed after calcium showed no resemblance to the properties of the elements above. What were the criteria used by Mendeleev in creating his Periodic Table?

This means that if elements are arranged in the increasing order of their atomic masses, Ncert Solutions For Class 10th English Footprints Without Feet Chapter 5 then their properties get repeated after regular intervals. Why do you think the noble gases are placed in a separate group? Noble gases are inert elements. Their properties are different from the all other elements.

Therefore, the noble gases are placed in a separate group. Chapter 6: Life Processes �.

A total of 7 questions are given in this chapter. How can I study well for English Class 10? Last not but least your handwriting does affect your marks. Question 5. Answer: a Corrosion : It is the process in which metals are eaten up gradually by the action of air, moisture or a chemical such as an acid on their surface.
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