The number of neutrons can be calculated by: ( me)

a. neutrons = mass number - electrons
b. neutrons = atomic number - mass number
c. neutrons = mass number - atomic number
d. neutrons = atomic number + electrons

b

Explanation:

to find the amount of neutrons subtract the atomic number from the mass number!

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72