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Chemistry 19 Online
ashten0219:

Using the periodic table entry below, match the phrases with their corresponding values. Number of protons atomic mass number of electrons in the n = 1 shell number of electrons in the n = 3 shell number of neutrons.

ashten0219:

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ashten0219:

The corresponding matches are 20, 39, 19, 8, and 2

Acolgrove:

i am sorry i am not sure mabey ask dude for help

ashten0219:

Thank you for trying. :)

Acolgrove:

yw

ashten0219:

@dude

Pixel:

number of protons is always in the left corner

Pixel:

atomic mass is under the element

ashten0219:

So the number of protons is 19. the atomic mass is 39

Pixel:

yes

Pixel:

atomic mass = Protons + Neutrons protons = 19 39 = 19 + ??

ashten0219:

20

Pixel:

20 Neutrons

ashten0219:

so that's neutrons?

ashten0219:

we sent at the same time lol

Pixel:

the 4 set of numbers on the right side correspond to the Shells so the first number is the 1 shell and the third is the 3 shell

ashten0219:

the first shell is 2 and the second shell is 8

Pixel:

yep

ashten0219:

crap it asked for the 3rd shell not second, good thing they're both the same XD. Thank you pixel!

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