Advertisements
Advertisements
प्रश्न
Fill in the blank:
Atoms are _____
Advertisements
उत्तर
Atoms are neutral.
APPEARS IN
संबंधित प्रश्न
Write the names of the elements present in the following compound.
Common salt
Fill in the blank
An ion with positive charge is called ______
Who originated the word ‘atom’ ?
Name the unit in which the radius of an atom is usually expressed.
Why is it not possible to see an atom even with the most powerful microscope ?
State two observations which show that atom is not indivisible.
What is an atom ? How do atoms usually exist ?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Electron, proton, neutron are the types of ______ in an atom.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
In what respects do the three isotopes of hydrogen differ? Give their structures.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
K: Potassium:: C: ______.
Define the following term with an example.
Non-metal
The number of atoms present in a molecule is called its ______.
______ is a substance that is made up of three oxygen atoms chemically combined.
Lead is also known as plumbum.
