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प्रश्न
Fill in the blank
A charged particle is called an _____
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उत्तर
A charged particle is called an ion
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
WRITE SHORT ANSWER
Define an ionic compound.
Define:- Radicals
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
Who originated the word ‘atom’ ?
State Dalton’s atomic theory.
Define: An Atom:
Fill in the blank
An _______ is electrically neutral.
Fill in the blank
An excess of electrons produces a ________ charge.
What are the building blocks of matter ?
Write the relation between nanometre and metre.
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?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
State true or false. If false, correct the statement.
An atom is electrically neutral.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Define the following term with an example.
Non-metal
______ is the smallest particle of an element.
Give the salient features of “Modern atomic theory”.
