Igneous rocks form when minerals crystallize from cooling magma or lava. the more slowly the magma or lava cools, the larger the crystals are able to grow.

the images below show two different igneous rocks. examine the images, and then answer the question that follows.
assuming that these images are shown at the same scale, which of the following can be concluded based on the information above?
a.
rock x formed from magma; rock y formed from lava.
b.
rock y cooled more slowly than rock x.
c.
both rocks cooled at the same rate.
d.
rock x cooled more slowly than rock y.

im not exactly sure but i think its b!

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.  

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying