Almost all of an atom's mass is found in its nucleus, located in the center of the atom. An atom's nucleus can contain two types of particles: protons and neutrons.
The nucleus of every atom contains one or more protons. Each proton has a positive electrical charge.
In many atoms, the nucleus also contains neutrons. A neutron has no electrical charge.
Determine whether each statement is true or false to complete the table.

What is the percent by mass of oxygen in fe2o3

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Which of the following units is not an official si unit? mole liter kilogram ampere