Chemistry CH 1

Tell me what theory means

It is a set of tested hypothesis that gives an overall explanation of some natural pheonomenon

Tell me what a model is,

It is also a set of tested hypotheses that gives an overall explanation of a natural phenomenon.

Tell me what is natural Law

It is a observed behavior that is formulated into a statement

Tell me what is the law of onservation of mass

The overstation that the toal masss of materials is not affected by a chemical change in those materials

Tell me what the law of conservation of mass is.

It means mass cannot be created or destroyed

Tell me what is the law of defintion proportion.

It is when a given compound always contains exactly the same proportion of elements by mass.

Tell me what is atomic mass

It is the total mass of an atom

Tell me what Avogadro’s hypothesis is.

At the same temperature and pressure, equal volumes of different gases contain the same number of particles.

Tell me what cathode-ray tubes are.

Tell me what is a nuclear atom.

It is an atoms with a dense ceneter of positive charge

Tell me what is a proton.

A postively charge equal in magnitude to the electron’s negative charge

Tell me what is a neutron.

It is has relatively the same mass as a proton, but no charge.

Tell me what an isotope,

Atoms with the same number of protons but a different number of neutrons.

Tell me what is an atomic number.

It is the number of protons

Tell me what the mass number is.

It is the total number of protons and neutrons

Tell me what an ion is

It is when one or mroe electons are removed or added to a neutral atom

Tell me what a cation is.

It is a positive ion

Tell me what an anion is.

It is the chlorine has become an ion with a negative charge