| Not Secure I cvg.cengagenow.cornirntakeAssignment/takecovalenActivity.dorocato

Question

| Not Secure I cvg.cengagenow.cornirntakeAssignment/takecovalenActivity.dorocator-assignment-take Chapter 2: EOC Question 1 Question 2 Question 3 Question 4 Question 5 1 pt This question has multiple parts. Work all the parts to get the most points 1 pt Give the complete symbol (2 X), including atomic number and mass number, of 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt a manganese atom with 27 neutrons. Question Question7 Question Question9 Question 10 Question 11 X: b a protactinium atom with 140 neutrons. X: Ca platinum atom with 114 neutrons. Question 12 13 Question 14 X: Question uestion 15 1pt Submit Answer Try Another Version 10 ltem attempts remalning Question 16 1pt Progress 4/18 items Due Jan 31 at

Explanation / Answer

a)
atomic number of manganese is 25 and its symbol is Mn
so,
Z = atomic number
= 25
mass number= A
= Z + (number of neutron)
= 25 + 27
= 52

so, correct symbol is
2552Mn

b)
atomic number of protactinium is 91 and its symbol is Pa
so,
Z = atomic number
= 91
mass number= A
= Z + (number of neutron)
= 91 + 140
= 231

so, correct symbol is
91231Pa

c)
atomic number of platinum is 78 and its symbol is Pt
so,
Z = atomic number
= 78
mass number= A
= Z + (number of neutron)
= 78 + 114
= 192

so, correct symbol is
78192Pt

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