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1
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



Explanation:
Subject: Chemistry
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If the atomic number of Krypton is 36, then its electronic configuration is:

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The main cause of rancidity in foods is the ____ of fats and oils.

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Answer & Explanation Answer: D) oxidation

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Which of the following is essential for the synthesis of thyroxin?

A) Potassium B) Calcium
C) Iodine D) Sodium
 
Answer & Explanation Answer: C) Iodine

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An ∝ particle is _____.

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Answer & Explanation Answer: B) A helium nucleus

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A proton is identical to _____.

A) the nucleus of helium B) the nucleus of a hydrogen atom
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Answer & Explanation Answer: D) a beta particle

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