Question

How many protons, nuetrons and electrons does 28/14Si-4

Answer 1

I think its 14 protons 14 neutrons and 10 electrons?? This sound right?

Answer 2

no, the charge is -4, correct?

Answer 3

Correct

Answer 4

so you have to add 4 electrons to a balanced Si atom

Answer 5

hmmm, I know the bottom 14 stays the same. Where do I add the electrons?

Answer 6

if the atom is balanced or neutral then the number of electrons equals the number of protons. so how many protons in Si?

Answer 7

28?

Answer 8

no, that's the atomic weight.

Answer 9

atomic weight = protons + neutons

Answer 10

the number of protons is the same a teh atomic number. it's what gives that element it's identity. What you originally posted was mostly correct... all except the number of electrons. you went the wrong way in subtracting 4 from 14, you should have added 4 to 14 to get a -4 charge.

Answer 11

Ok this helped out a lot. Thanks!

Answer 12

Remember if the charge is - then there are more electrons than protons. if the charge is + then there are more protons than electrons.
you can't change the number of protons without changing the element.

Answer 13

only nuclear decay or nuclear reactions change elements into other elements.