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प्रश्न
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
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उत्तर
In water, the ratio of oxygen to hydrogen is 8:1 by mass.
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संबंधित प्रश्न
WRITE SHORT ANSWER
Name three inert gases.
Define:- Molecule
Write the names of the elements present in the:-
Glucose
Define: Ions
Name two particles found inside the nucleus. What are they collectively called ?
Who originated the word ‘atom’ ?
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Name the three subatomic particles present in an atom.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
What is an atom ? How do atoms usually exist ?
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?
Which of the following statement is correct about the atom of an element ?
Draw the electron dot structure of this compound.
A compound containing one atom of carbon and two atoms of oxygen is ______.
Define – Atom.
Which of the following statements made by Dalton has not undergone any change?
Atoms of different elements having the same number of ______ are called isotones.
Which of the following has maximum number of atoms?
Lead is also known as plumbum.
