The element sodium has an atomic number of 11 and a mass number of 23. how many protons, neutrons, and electrons does one atom contain? a) 11p+, 11e-, 12no b) 11p+, 12e-, 11no c) 11p+, 11e-, 23no d) 12p+, 12e-, 11no

A__ is two or more substances that are together in the same place but are not chemically combined

0.09 moles of sodium sulfate in 12 ml of solution

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.