When does a physical change occur

What is is the average mass of a proton or a neutron? a) 1 amu b) 2 amu c) 3amu d) 4 amu

Which is the best label for the dotted-line arrow? O force of Earth's gravity O moon's attraction to the Sun O moon's motion without gravity O orbit of the moon around Earth rth

What is the half life of an isotope that is 75% decayed after 16 days?

An atom can be described as a-the smallest particle that has all the characteristics of a compound b-the smallest particle that has all the characteristics of an element c-a charged particle that is similar to a molecule d-a charged particle that is

1-Which reaction shown below is carried out by nitrifying bacteria? I will mark you as brainlist Choose: A.{ammonium} to {nitrate} B.{nitrate} to {nitrogen gas} C.{nitrogen gas} to{ammonium}

What is the atomic number of magnesium?

Explain how earth plates and lithosphere are related

What is the name for the Fe2 + cation? Iron ion Iron (II) ion Ironide Ferride ion

When designing an experimental investigation, why is it important to test only one variable?

Most fruit juices are a solution of water, sugar, and fruit-specific chemicals. in this solution, identify the solvent and solutes.