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The chart below gives the atomic number and mass number of two elements.
Element I
Element II
Atomic number
10
9
Mass number
20
19
How many protons does Element II have?
09
O 10
O 19
O 20

Sagot :

Element || has 9 protons. It’s F “Fluorine”.
And element | has 10 protons it’s Ne “Neon”.
Protons are located at the up of every single elements.
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