Question

What is the mean of 6.9+39.1 /2​

Answer 1

Here, Atomic mass of Lithium = 6.9

Atomic mass and Potassium = 39.1

Now, Using Dobereiner' triad ,

Arithmetic mean = 39.1 + 6.9 ÷ 2

Sodium= 46/2

Sodium = 23

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Answer 2

Answer:

6.9+39.1/2

=23.0

Step-by-step explanation:

6.9+39.1 = 46

then divide 4÷2, 6÷2

= 2,3

=23