Estrogen? i’m not 100% sure tho
The correct answer is B. Most prevalent in living things. It is also helpful to know that SPONCH stands for S - Sulfur, P - Phosphorous, O - Oxygen, N - Nitrogen, C - Carbon, and H - Hydrogen; these are key elements that compose living things.
The element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000
the fossil bone is 20,000 years old
Explanation:
Molecules contain two or more atoms and are held together by covalent bonds, whereas compounds are held together by ionic bonds. Two or more elements bonded together through ionic attraction.
