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प्रश्न
Write the names of the elements present in the:-
Acetic acid
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उत्तर
Acetic acid : Carbon, hydrogen, oxygen.
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संबंधित प्रश्न
WRITE SHORT ANSWER
What is radioactivity?
Define:- Atom
What does an atom consist of ? Explain.
Define: Covalent bond
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 ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
How is the size of an atom indicated ?
Name the unit in which the radius of an atom is usually expressed.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Name the gas that.
Turns moist starch iodide paper blue black.
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 –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
In all atoms of an element
The volume occupied by 4.4 g of CO2 at S.T.P ______
In the nucleus of `""_20"Ca"^40`, there are ______
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
Write any two observations which support the fact that atoms are divisible.
