Which of these is an example of a physical change?

1. melting a substance

2. breaking chemical bonds

3. forming chemical bonds

2. nuclear decay

What type of forest would you find south of spruce

Enter the electron configuration for the ion most likely formed by phosphorus. Express your answer in the order of orbital filling as a string without blank space between orbitals.

When liquid is poured through a filter

Which of the following is a property of matter?

How is heat produced in a chemical change

How was helium first discovered?

When is alpha particle emission most likely to occur? A. When the nucleus has more than 83 protons. B. When the ratio of neutrons to protons in the nucleus is too high to be stable. C. When the nucleus has a mass of more than 83 amu. D.

Researchers used a combustion method to analyze a compound used as an antiknock additive in gasoline. A 9.394 mg sample of the compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in the combustion.

The formula for binary ionic compound formed between cesium and fluorine

If the mass of a material is 76 grams and the volume of the material is 16 cm3, what would the density of the material be? g/cm3