36. Predict the charge that the ion formed from fluorine woul 1- B) 2+ E) 2- d.

Question

36. Predict the charge that the ion formed from fluorine woul 1- B) 2+ E) 2- d. +1 0 37. What is the charge on the iron ion in FeCl,? -3 +3 a. 38. Which element forms ionic compounds with the formula XBra a. sodium b. aluminum c. lithium d. calcium e. carbon 39. Which two elements would you expect to show the most simila a. Se and Br b. B and C c. Li and Be d. Sn and Bi e. Ca and Sr 40. The mass number is equal to A) the sum of the number of the electrons and protons. B) the sum of the number of the neutrons and electrons. C) the sum of the number of protons, neutrons, and electr DD the sum of the number of protons and neutrons 1 Identifa liamid

Explanation / Answer

36)
F has 7 electrons in its valance shell
So, it will accept 1 more electron and will attain stable noble gas configuration
After accepting 1 electron, it forms F- ion
Answer: A

37)
FeCl3 has Cl which is of -1 charge
Since there are 3 Cl atoms, total negative charge is -3
To balance this, Fe should have charge of +3
Answer: b

38)
X should form +3 charge
So, it must be of group 3
Aluminium is in group 3
Answer: b

39)
Elements in the same group show similar properties
Both Ca and Sr are in group 2 and hence they will have similar properties
Answer: e

40)
Mass number is sum of number of protons and neutrons
Answer: D

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