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प्रश्न
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
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उत्तर
What is the atomic mass of the atom= 27
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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
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Atom
What does the word ‘atom’ mean?
Fill in the blank
An _______ is electrically neutral.
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An excess of electrons produces a ________ charge.
Write the full form of IUPAC.
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How is the size of an atom indicated ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
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Define the following term with an example.
Compound
An element is composed of ______ atoms.
The number of atoms present in a molecule is called its ______.
Which of the following has maximum number of atoms?
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
______ is a substance that is made up of three oxygen atoms chemically combined.
