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प्रश्न
What are the building blocks of matter ?
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उत्तर
Atoms and molecules are the building blocks of matter.
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संबंधित प्रश्न
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.
Write the names of the elements present in the:-
Glucose
Write the names of `"FeS"` compounds :
Give two examples for each of ionic and covalent bond.
What does the word ‘atom’ mean?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
An excess of electrons produces a ________ charge.
One nm is equal to :
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?
What is the contribution of the following in atomic structure?
Maharshi Kanada
In what respects do the three isotopes of hydrogen differ? Give their structures.
Draw the electron dot structure of this compound.
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Draw the structure of an atom and explain the position of the sub-atomic particles.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
The smallest unit of an element is ______.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
