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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.

 

Grade:12th pass

1 Answers

Adarsh Pal
askIITians Faculty 159 Points
8 months ago

Option A is false. 

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

 
Option B is true. Atoms are the basic units from which molecules and ions are formed. A molecule is comprised of two or more chemically bonded atoms. The atoms may be of the same type of element, or they may be different. Atoms can readily gain or lose electrons. If electrons are lost or gained by a neutral atom, a charged particle is formed called as an ion.

Option C is true. Atoms are always neutral in nature. The nucleus of an atom (contains protons and neutrons) remains unchanged after ordinary chemical reactions, but atoms can readily gain or lose electrons.

Option D is true. Atoms aggregate in large numbers to form the matter that we can see, feel or touch. Atoms and molecules are all composed of matterMatter is anything that has mass and takes up space. Matter exists in 3 states gases, liquid and solid.

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