Question

c) Five atoms are labelled A to E
Which one of these contain 7 proton.
ii. Write the formula of the compound formed between C and D.
Identify the metals and non-metals.
Group no and period no of A
Atoms
Mass No
Atomic No
iv.
А
40
20
B
19
9
C
7
3
D
16
8
E
14
7
​

Answer 1

1. atom E contains 7 proton.
2. the compounds found between cand are.1-berrilium(Be),metal,group-2 ,period .no.-2nd,mass no. 9 atomic no-4

2.-Boron( B)non metal,group-13 period-2nd. mass no. 10 atomic no. 5

3.carbon(c) non metal group 14 period no. 2nd mass no. 12 atomic no. 6

4.nitrogen(N) group 15 period-2nd mass no. 14 atomic no. 7

Answer 2

Answer:

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