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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Elements X and Y Have 1 and 7 Electrons in Their Outermost Shell Respectively. Which Will Form Negative Ion? - Chemistry

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प्रश्न

Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which will form negative ion?

एक शब्द/वाक्यांश उत्तर

उत्तर

Y

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पाठ 4: Atoms, Molecules and Radicals - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Additional questions | Q 6.4

संबंधित प्रश्‍न

MATCH THE COLUMNAS

1. Jpham  Dalton a. Neutrons
2. Atom b. Model of the atom
3. Chadwick c.The atomic theory of matter 
4. Rutherfrod d. Positively  charged 
5. Protons e. Electricity neutral 
6. Nuclear  fusion  f. Generator of electricity 
7.Gamma -rays  g. High penetrating power 
  h.Energy in sun 

Write the names of the elements present in the:- 

Ammonia


Write the names of `("NH"_4)_2"SO"_4` compounds:


Fill in the blank

An ion with negative charge is called _______


Define: Covalent bond


How did Neils Bohr visualise the atom ?


An atom has 13 protons and 14 neutrons.

How many electrons would be present in this atom ?


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


Why is it not possible to see an atom even with the most powerful microscope ?


State two observations which show that atom is not indivisible.


What is an atom ? How do atoms usually exist ?


How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)


Give brief information of three subatomic particles with reference to electrical charge, mass and location.


Define the following term:

Atom


Match the pairs.

Group 'A' Group 'B'
a. Proton i. Negatively charged
b. Electron ii. Neutral
c. Neutron iii. Positively charged

Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which element will gain electron?


State true or false. If false, correct the statement.

The basic unit of an element is molecule.


______ is a substance that is made up of three oxygen atoms chemically combined.


Lead is also known as plumbum.


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