Given the equation representing a reaction:

2Ca (s) + O2 (g) → 2CaO (s)

During this reaction, each element changes in

1) atomic number

2) oxidation number

3) number of protons per atom 4) number of neutrons per atom

Which part of an investigation is only found in an experimental investigation?

A metalloid has properties of A. both solids and liquids. B. both gases and liquids. C. both metals and non-metals. D. both elements and compounds.

What is the measurement 222.008 mm rounded off to four significant digits?

There are two different compounds of sulfur and fluorine.

What is the proper way to write sodium in crystal form

What happens when the threat of exposure to dirty air is reduced in a community? There is enough oxygen available for people's lungs to function normally The amount of indoor air pollutants released during a fossil fuel burn decreases There is a

Is chicken noodle soup an element, a compound, a homogeneous mixture, or a heterogeneous mixture?

How is the amount of sunlight affect the makeup of an ecosystem

How many moles are in 65 g of carbon dioxide (CO2) ?

kilograms represented by the mass defect for thorium - 234=3.09x 10-27 kg what is the nuclear binding energy for thorium - 234