Chemistry Cumulative final Questions & Answers 100% Correct!!

Which of the following statements about the phases of matter is true? - ANSWERIn both solids and liquids, the atoms or molecules pack closely to one another. An atom that has lost an electron is... - ANSWERA cation Two or more substances in variable proportions, where the composition is inconsistent throughout are? - ANSWERA heterogeneous mixture Identify the charges of the protons,neutrons and electrons. - ANSWERProtons +1, neutrons 0, electrons -1 All of the following are SI base units of measurement, except - ANSWERGram Daltons atomic theory states - ANSWERThat matter is composed of small indestructible particles called atoms. A substance composed of two or more elements in a fixed, definite proportion is - ANSWERA compound The statement, "in a chemical reaction, matter is neither created nor destroyed" is called - ANSWERThe law of conservation of mass Rutherford's Gold foil experiment helped prove - ANSWERThat the mass of an atom is concentrated in a very small space Molecules can be described as - ANSWERTwo or more atoms chemically joined together Which of the following statements about isotope is true? - ANSWERIsotopes of the same element always have a different number of neutrons The scientific method - ANSWERIs based on continued observation and experiment Calculate the atomic mass of element X, if it has 2 naturally occurring isotopes with the following masses and Natural abundances. - ANSWER108.19 amu A pure substance that can't be chemically broken down into simpler substances is - ANSWERAn element Determine the number of protons, neutrons and electrons in the following