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प्रश्न
Electron, proton, neutron are the types of ______ in an atom.
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उत्तर
Electron, proton, neutron are the types of subatomic particles in an atom.
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.
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Write the names of the elements present in the:-
Glucose
Write the names of `"Na"_3"PO"_4` compounds :
Define: Covalent bond
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Is it possible to see atoms these days ? Explain your answer.
Which of the following statement is correct about the atom of an element ?
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
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.
Define the following term with an example.
Compound
In all atoms of an element
______ is the smallest particle of an element.
Give the salient features of “Modern atomic theory”.
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
