Science, asked by pratham12508, 7 months ago

9. Which of the following elements exhibits valency 2?
a. Oxygen
b. Sodium
C. Aluminium
d. Nitrogen
10. Which of the following represents an element?
a. NaCl
b. CI2
C. HCI
d. Nitrogen
d. KCI

Answers

Answered by sahaj56

5

Answer:

9-b

10-c

Explanation:

Please mark as brainliest

Answered by marywhite1

2

Answer:

Explanation:

9. Oxygen has a valency of 2.

10. Nitrogen is the chemical element with the symbol N and atomic number 7.

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