Question

Q1. a) What is the relationship between electron arrangement and group number?
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b) How does the electron number determine the period of a certain element?
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C ) Why does Neon ( proton number=10 ) not form ion?
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d) What are d block elements?
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Q2. Give one similarity and one difference between elements of group I and group II.
similarity
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difference
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Q3. Given below are few elements with proton number and represented by letters that are not
their actual symbols.
A 3, B 18, C 17, D 13, E 20, F 8
a) Identify each of the above element with its symbol.
A _______________________ B ______________________
C ________________________ D ______________________
D ________________________ E _____________________
F _________________________
b) Which of the above element is alkali metal? ________________________
c) Write the formulae of compounds formed between
i) E and C ________________
ii) D and F ________________

d) Identify the group to which B 18 belongs and write two properties of the group.
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e) Which of the above element belongs to halogens? _____________________________

Answer 1

Answer:

it has two elements belong to halogen

Answer 2

please ask separately