write the group number and period number of p and q
Answers
Answer:
An element whose atomic number is 20 is calcium. Whereas element whose atomic number is 17 is chlorine.
Calcium is placed in period 4 and group 2. On the other hand, chlorine is placed in period 3 and group 7.
Therefore, element P is calcium and element Q is chlorine.
The compound formed when P reacts with Q is CaCl_{2}CaCl
2
. The chemical reaction is as follows.
Ca + Cl_{2} \rightarrow CaCl_{2}Ca+Cl
2
→CaCl
2
Answer:
Group 1 Group 2
One electron in valence shell Two electron in valence shell
Larger atomic size compared to Group 2 Smaller atomic size compared to Group 1
More metallic in nature Comparatively less metallic
Highly electropositive, readily loses electron Comparatively less electropositive
Oxide formula: X
2
O Oxide formula: XO
Chloride formula: XCl Chloride formula: X
2
Cl