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प्रश्न
______ is the smallest particle of an element.
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उत्तर
Atom is the smallest particle of an element.
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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?
WRITE SHORT ANSWER
Define an ionic compound.
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Write the relation between nanometre and metre.
What value has been given to the mass of this reference atom ?
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 positive ion?
Does the solubility of a substance change with temperature? Explain with the help of an example.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
