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Write the symbols, including Mass No. and Atomic No. for the atoms containing
the fundamental particles below:
No. of Protons No. of Neutrons Symbol
11 12 1123Na
7 7
56 81
19 20
19 21
18 22
2. Complete the table
No. of No. of
No. of Protons Symbol
Neutrons Electrons
2965Cu
1226Mg
1633___
1225Mg 2+
28 28 ___60___
___37Cl -
Answers
No. of Protons No.…read more

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Ba
19 20 1939K
19 21 1940K (isotope)
18 22 1840Ar
No. of No. of
No.…read more

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