Radioactive isotopes have been used commercially in:

smoke detectors

older watches with luminescent dials

sterilization of food

all of these applications

Explain why a sodium atom and a chlorine atom undergo an iconic bond?

B) How many kilograms of carbon dioxide are formed when 24.42 g of iron is produced?

What does the electronegativity of an element indicate?

An emerald gemstone is an impure form of the mineral beryl, Be3Al2Si16O18. What is the percentage of silicon in the mineral? a. 6.59% b. 54.9% c. 35.2% d. 3.30% e. 3.43%

15. Which state of matter has a definite volume and takes the shape of its container? liquid gas solid

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?