Atoms of which two elements have a combined total of 23 protons? A. Sodium, Na, and magnesium, Mg
B. Boron, B, and carbon, C
C. Copper, Cu, and zinc, Zn
D. None of these

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

What is the percentage of hydrogen in nitrogen trihydride