Advertisements
Advertisements
प्रश्न
State true or false. If false, correct the statement.
An atom is electrically neutral.
पर्याय
True
False
उत्तर
An atom is electrically neutral- True
APPEARS IN
संबंधित प्रश्न
WRITE SHORT ANSWER
What is radioactivity?
WRITE SHORT ANSWER
Name three inert gases.
Write the names of the elements present in the :-
Sulphuric acid
Write the names of `"FeS"` compounds :
Fill in the blank
An ion with positive charge is called ______
What does an atom consist of ? Explain.
What does the word ‘atom’ mean?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Fill in the blank
If an atom gains an electron, it is called an _______
What are the building blocks of matter ?
Why is it not possible to see an atom even with the most powerful microscope ?
What value has been given to the mass of this reference atom ?
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
In what respects do the three isotopes of hydrogen differ? Give their structures.
Name the gas that.
Turns moist starch iodide paper blue black.
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 smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
The smallest particle of matter that can exist by itself is ______.
The basic unit of matter is ______.
The smaller particles found in the atom is called ______.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
The volume occupied by 4.4 g of CO2 at S.T.P ______
Atoms of different elements having the same number of ______ are called isotones.
Give the salient features of “Modern atomic theory”.
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
The most abundant type of atom is the universe is ______.
