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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Write the Names of the Elements Present in the :- Glucose - Chemistry

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प्रश्न

Write the names of the elements present in the:- 

Glucose

एक पंक्ति में उत्तर
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उत्तर

Glucose : Carbon, hydrogen, oxygen.

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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 2.4

संबंधित प्रश्न

TRUE \ FALSE

Neils Bohr gave the theory to explain the arrangement of protons in an atom.


WRITE SHORT ANSWER

What is radioactivity?


ANSWER IN DETAIL

State the postulates of the Dalton’s atomic theory.


 Fill in the blank:

Atoms are _____


Fill in the blank

An ion with positive charge is called ______


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


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

What is the atomic numebr of X ?


What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?


Write the relation between nanometre and metre.


Fill in the following blanks with suitable words :

In water, the proportion of oxygen and hydrogen is .............. by mass.


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.


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


Draw the diagrams representing the atomic structures of the following: Neon


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.


The smallest particle of matter that can exist by itself is ______.


Rewrite the given sentence in correct form.

Elements contain two or more kind of atoms and compounds contain only one kind of atom.


Define the following term with an example.

Metalloid


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


Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order

  1. Rutherford’s atomic model
  2. Thomson’s atomic model
  3. Bohr’s atomic model

Lead is also known as plumbum.


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