what did you notice about the way the soil particles sank in the water? how was it different from the way the soil and sand particles sank?
what does the soil look like in the "soil" bottle? how is it different from the soil in the "soil and sand" bottle?
in the "soil and sand" bottle, which type of soil is on the bottom? why?
the amount of each size particle in soil is the particle size distribution. do you think this is a good way to determine particle size distribution? why or why not?

i need asap! i don't know how to answer the questions because i messed up the "soil" bottle and it is due today.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

i think   the answer is c hope i'm right

i wish i could but this one is weird give me abc and i can solve it.