Advertisements
Advertisements
Question
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Advertisements
Solution
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
APPEARS IN
RELATED QUESTIONS
Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4
Explain the following briefly:
Helium does not form He2 molecule
What type of bond is formed between two atoms, when the electronegative difference between them is low ?
State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of reducing agent.
State the type of bond between Y and Z and give its molecular formula.
Give the orbital diagram of the following:
Magnesium chloride
The element that would form anion by gaining electrons in a chemical reaction is ______.
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
