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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Define:- Radicals - Chemistry

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प्रश्न

Define:- Radicals

परिभाषा

उत्तर

Radicals : A radical is an atom of an element or a group of atoms of different elements that behaves as a single unit with a positive or negative charge on it.

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अध्याय 4: Atoms, Molecules and Radicals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 4 Atoms, Molecules and Radicals
Exercise | Q 1.3

संबंधित प्रश्न

If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.


ANSWER IN DETAIL

Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?


Define:- Molecule


Define: Chemical bond


What does an atom consist of ? Explain.


State Dalton’s atomic theory.


Name the particle or particles you would expect to find in :

The nucleus of an atom


A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the mass number of X ?


A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the charge on the particle ?


Fill in the blank

A charged particle is called an _____


Name the three subatomic particles present in an atom.


What are the building blocks of matter ?


State two observations which show that atom is not indivisible.


An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?


The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.


What is the contribution of the following in atomic structure?
Maharshi Kanada


Name the gas that.

Turns moist starch iodide paper blue black.


The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus


Define the term ions or radicals.


What is the fundamental particle of an element?


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