Which of the following is true about mixtures?
a) mixtures consist of two or more substances chemically combined.
b) mixtures cannot be separated by physical means.
c) mixtures consist of only one kind of atom.
d) mixtures have to or more substances mixed together, but are not chemically combined.

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Which terms are used to identify pure substances

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.