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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

A Radical Take Part – Unsplit in a Chemical Reaction and Retains Its Identity in Reactions. with Reference to the Radical – Ammonium Bisulphate Carbonate State the Group

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प्रश्न

A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –

  1. ammonium
  2. bisulphate
  3. carbonate

state the group of atoms present in each radical.

सारिणी
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उत्तर

Radical Representattion Group of atoms present in a radical
a. Ammonium NH4+ 1 atom of nitrogen;
4 atom of hydrogen
b. Bisulphate HSO41− 1 atom of hydrogen and sulphur;
4 atoms of oxygen
c. Carbonate CO3− − 1 atom of carbon;
5 atoms of oxygen
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अध्याय 4: Atomic Structure - Exercise

संबंधित प्रश्न

Define:- Radicals


Fill in the blank

An ion with negative charge is called _______


 Name the particles which revolve around the nucleus.


Give two examples for each of ionic and covalent bond.


How did Neils Bohr visualise the atom ?


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

Does the particle have an excess of electrons or a deficiency of electrons ?


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


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?


Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.

(Atomic masses : Al = 27 u ; Fe = 25 u)


Give scientific reason.

All the mass of an atom is concentrated in the nucleus.


Define the following term:

Atom


Define the following term with an example.

Metalloid


______ is the smallest particle of an element.


Atoms of different elements having the same number of ______ are called isotones.


Atoms of one element can be transmuted into atoms of other elements by ______


The number of atoms present in a molecule is called its ______.


A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?


The first scientific theory about atoms was given by J J. Thomson.


A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.


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