10 points 1. An atom of a certain element has the atomic number 89 and the mass
of 227 amu. How man neutrons does the atom have? *
a. 89
b. 227
C. 138
O d. 316
2. An atom of Be has four protons, five neutrons and four electrons. What 10 points
is the mas of Be? *

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

What is the name of the enzyme that forms at the start of transcription?