Classify each type of matter as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound; if it is a mixture, classify it as homogeneous
or heterogeneous.
(a) a lead weight
(b) seawater
(c) distilled water
(d) Italian salad dressing

Two things that biomedical has invented or innovated

Why is nh3 classified as a polar molecule

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.