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Hydrogen has an atomic number of 1. How many neutrons and protons are in a hydrogen-3 isotope?
a. O neutrons, 3 protons
b. 1 neutron, 2 protons
C. 2 neutrons, 1 proton
d. 3 neutrons, 0 protons

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

What are the similarities of physical and chemical change ?