Question

5. What does a formula represent?
6. Define valency in terms of hydrogen.​

Answer 1

Answer:

5. to describe the types of atoms and their numbers in an element or compound

6.The valency when defined in terms of hydrogen is the number of hydrogen atoms that can combine with or replace one atom of the element.

Answer 2

Answer:

Explanation:

5. What does a formula represent?

Chemical formulas are used to describe the types of atoms and their numbers in an element or compound.

6. Define valency in terms of hydrogen.​

The valency when defined in terms of hydrogen is the number of hydrogen atoms that can combine with or replace one atom of the element.