Please help.

Carbon-14 has a half-life of 5,730 years. A plant fossil was found to contain 1.75 grams of carbon-14. How long ago did the bone contain 7 grams of carbon-14?

THE BONE WAS 11, 460 YEARS WHEN IT CONTAIN 7 g OF CARBON-14

Explanation:

To calculate the age of a substance using isotopic dating, we use the equation below;

how old (time) = number of lives (n) * half life (t1/2)

n =the number of lives from 7g to 1.75 g

n = 7 > 3.5 > 1.75 = 2 lives

t1/2 = 5730 years.

How old was the fossil when it contains 7 g of carbon- 14 will be;

how old = n * t1/2

= 2 * 5730 years

= 11, 460 years.

The bone contains 7 grams of carbon-14 at 11, 460 years.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.