For each of the pictures below, decide what element it comes from and circle atom or ion Then write the chemical symbol and the charge if any.

#1 Atom

Oxygen

Charge neutral atom

#2 ion

Oxide ( oxygen anion)

Charge 2-

Formula O2-

#3 Atom

Flourine

Neutral atom no charge

#4 atom

Flourine

Neutral atom no charge

#5 ion

Sulphide

Charge 2-

S2-

#6 ion

Chloride Cl-

Charge -1

#7 atom

Chlorine

No Charge neutral

#8 ion

Calcium ion cation

Charge 2+

Ca++

#9 atom

Hydrogen (protium)

No charge neutral

#10 atom

Hydrogen (deutrium)

No charge neutral

#11 ion

Proton H+

Charge +1

#12 atom

Helium

No charge neutral atom

Explanation:

To find charge we need difference in proton and electron if proton are equal to electron then this is neutral atom

If electron are more this is negative charge ion

For example in oxygen 8 proton and 10 electron its charge is negative 2

If proton are more this is positive charge ion

For example in calcium 20 proton and 18 electron positive ion is formed.