# of protons, electrons, and neutrons

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• #5677
StudentGuy789
Participant

1.) How many protons, electrons, and neutrons are in the following:

C atom
C atom w/ mass # = 14
N atom w/ mass # = 14
Ca atom
Ca +2 ion
H+ ion

I’m not sure about the ions the most.

2.) What level of protein structure changes the three dimensional shape of a polypeptide because of a variety of types of interactions between side chains of amino acids?

I think its secondary or teritary structure but I’m not sure which one.

Thanks

• #54646
canalon
Participant

2) Define secondary and tertiary structure.

• #54657
StudentGuy789
Participant

1.) protons, electrons, neutrons

C atom: 6,6,6
C atom w/ mass # = 14: 6,6,8
N atom w/ mass # = 14: 7,7,7
Ca atom: 10,10,10
Ca +2 ion: 12,10,10
H+ ion: 1,0,1

2.) secondary structure has only hydrogen bonds between the repeating constituents of polypeptide backbone. Can look like a helix or platlettes (sp?).

teritary structure is the overall shape of a polypeptide resulting from interactions between the side chains of the various amino acids.

I’ve asked my biology teacher and he said it was secondary. I talk to another biology teacher and he said it was teritary. So which is it? ❓

• #54664
baikuza
Participant

Carbon
atomic weight: 12
C (neutral atom)
proton: 6
electron : 6
1s2; 2s2; 2p2
neutron? look at the equation in the book of basic chemistry.. hehe.

Nitrogen
atomic weight: 14
N (neutral atom)
proton: 7
electron : 7
1s2; 2s2; 2p3
neutron? look at the equation in the book of basic chemistry.. hehe.

Calsium
Ca (neutral atom)
Proton: 20
electron: 20
[Ar] 4s2
neutron? look at the equation in the book of basic chemistry.. hehe.

2. 3D of protein represented in its tertiary structure.. and the more structure for its interaction with other compound is by quarternary structure…
can you extract what i mean?

• #54667
oppox
Participant

well its pretty easy, the atomic number tells u how many protons, if the atom is neutral it has the same number of electrons. The charge is regulated by the electrons, if it is a singel negative charge it has one electron more and so on.
substract the atom number from the atom weight to find out how many neutrons u have, basicly.

• #54742
baikuza
Participant

haha…
you get it.