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17=P
CL
35=P+N

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17=P
CL
35=P+N

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Inside neucleus is proton and neutron

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6 5
X     X
7     7

Are they isotopes?
ANS:NO. THEY HAVE DIFF NO. OF PROTONS, SO THEY ARE OF DIFF ELEMENTS.

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When an atom gains/loses electrons,it will become an ion

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Draw a square bracket[] when drawing ions

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If atom remove two electron it will become 2+/-

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If an atom loses electron it will become a positive or negative ion

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X = electron of NA

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Sodium+water=BOOM!!!!!

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Group 1=1 electron on the outer shell
Group 2=2 electron on the outer shell
Group 3=3 electron on the other shell
.
.
.
Group7=7 electron on the outer shell
Group0=0 electron on the outer shell

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What are their charges and mass ?
Where are they found?
Protons
Relative mass:1
Relative charge:+1

Neutrons
Relative mass:1
Relative charge:0

Electrons
Relative mass:1/1840
Relative charge:-1

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The entire row of elements

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Nitrogen=7Electrons
Electronic configuration is 2,5

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17=P
CL
35=P+N

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Drawing
Electronic
Figuration

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1st shell:2
2nd shell:8
3rd shell:8
4th shell:18
Total:36

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Isotopes have the same number of protons, but diff number of neutrons.

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P=Protons
N=Neutrons
E=Eletrons

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17=P
CL
37=P+N

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5}5P
B}6N
11}5

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2
HE
Helium
4

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2=atomic number=no of protons
HE
Helium
4=atomic mass=no of protons+ no of neutrons

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Zhueng yen is stupid