How many neutrons does an element have if its atomic number is 56 and its mass number is 152?

Jayne's science teacher mixed a clear liquid with a blue liquid in a beaker. After a few minutes there was a white solid at the bottom of the beaker. What is most likely true about the white solid?

Which physical properties can be used to Identity an unknown material?

If a sample of gold is a cube what is the length of each edge in centimeters

What is the valence electron of manganese?

The atom can be broken down into smaller parts. what are the smaller parts? how are atoms of hydrogen identical to each other, and how can they be different from each other? how are atoms of hydrogen different from atoms of helium?

Which type of luster gives the mineral the appearance of metal?

Anything that contains only one kind of material?

One mole of propane (c3h8) gas reacts with five moles of oxygen (o2) gas to produce three moles of carbon dioxide gas (co2) and four moles of water gas (h2o).

How many nitrogen molecules are in 1.2 moles of N2?

Which best describes how sediment forms?