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Which of the following statements is not true about an atom? A Atoms are not able to exist independently. B Atoms are the basic units from which molecules and ions are formed. C Atoms are always neutral in nature. D Atoms aggregate in large numbers to form the matter that we can see, feel or touch.

Which of the following statements is not true about an atom?

A

Atoms are not able to exist independently.

B

Atoms are the basic units from which molecules and ions are formed.

C

Atoms are always neutral in nature.

D

Atoms aggregate in large numbers to form the matter that we can see, feel or touch.

Ā 

Grade:12th pass

1 Answers

Adarsh Pal
askIITians Faculty 159 Points
3 years ago

OptionĀ AĀ is false.Ā 

Atoms are not able to exist independently.Ā All the elements on the far right side of the periodic table (inert or nobleĀ gas)Ā atoms can exist independently because they all fulfil the octet rule. They do not need bond to become stable.

Ā 
OptionĀ BĀ is true.Ā Atoms are the basic units from which molecules and ions are formed.Ā AĀ moleculeĀ is comprised of two or moreĀ chemically bondedĀ atoms. The atoms may be of the same type of element, or they may be different.Ā Atoms can readily gain or loseĀ electrons. If electrons are lost or gained by a neutral atom, aĀ charged particleĀ is formed called as anĀ ion.

OptionĀ CĀ is true.Ā Atoms are always neutral in nature.Ā The nucleus of an atom (contains protons and neutrons)Ā remains unchangedĀ after ordinary chemical reactions,Ā but atoms can readily gain or loseĀ electrons.

OptionĀ DĀ is true.Ā Atoms aggregate in large numbers to form the matter that we can see, feel or touch.Ā Atoms and molecules are all composed ofĀ matter.Ā MatterĀ is anything that has mass and takes up space.Ā Matter exists in 3 states gases, liquid andĀ solid.

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