the atomic number of two elements A and B are 19 and 13 respectively
1. identify the group number of A and B
2. identify the period of A and B
3. write the formula of their oxide
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Answer:
1-
A- Group 1
B- Group 13
2- A- Period 4
B- period -3
3- formula of oxide of A - A2O
formula of oxide of B- B2O3
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