In the nucleus of an atom, there are 18 protons and 20 neutrons. What are the atomic number and mass number of this isotope?

Which material is a liquid at room temperature 25 c copper nitrogen water table salt iron

What happens after a chemical change?

Calculating acceleration worksheet

This reaction appears to be destroying the logs. when it is over only ash will remain, the law of conservation of mass tells us no mass is lost. how can you explain this?

Which length is usually measured in micrometers? a. length of an earthworm b. length of a cell nucleus c. length of a football field d. distance across the United States

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids.

Near which location in New York State would a geologist have the greatest chance of finding dinosaur footprints in the surface bedrock?