14C has a half-life of 5600 years. An analysis of charcoal from a wood fire shows that

its 14C content is 25% of that in living wood.

How many years have passed since the wood for the fire was cut?

Why does bromine not react with sulphur?

What are Dalton's 5 theories?

A drop of liquid tends to have a spherical shape due to the property of 1. viscosity. 2. capillary action. 3. surface tension. 4. vapor pressure. 5. close packing.

Silicon has properties of both metals and no metals. Silicon is found in which section

Describe how you would draw a diagram that shows the electric field between two particles that attract each other.

Below are the steps of the engineering process (not necessarily in order) : 1) Know the background 2) Do the work 3) Make a plan 4) Identify a need 5) Evaluate and redesign 6) Test the results What is the correct order for these steps? APEX

Define "Homoglycan" and "Heteroglycan" and give an example of each

If you have 200 grams of iodine how many atoms do you have?

Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7-g sample of sea salt.

Which element in group 15 is the strongest metallic character?