Question

State The mass Number, atomic Number, the number of neutrons and the electronic configuration of the following atoms

Answer 1

Answer:

Ne

Mass Number (A) = 20

Atomic Number (Z) = 10

Number of Neutrons (A-Z) = 10 neutrons

Electronic Configuration: 1s2 2s2 2p6

Mg

Mass Number (A) = 24

Atomic Number (Z) =12

Number of Neutrons (A-Z) = 12

Electronic Configuration: 1s2 2s2 2p6 3s2

Cl

Mass Number (A) = 35

Atomic Number (Z) = 17

Number of Neutrons (A-Z) = 18

Electronic Configuration: 1s2 2s2 2p6 3s2 3p5

K

Mass Number (A) = 39

Atomic Number (Z) = 19

Number of Neutrons (A-Z) = 20

Electronic Configuration = 1s2 2s2 2p6 3s2 3p6 4s1

Answer 2

Explanation:

1- Ne- mass no- 20

atomic no- 10

no of neutrons- 10

Electronic configuration is - 1s2 2s2 2p6

2- Mg- mass no- 24

atomic no- 12

no of neutrons- 12

electronic configuration- 1s2 2s2 2p6 3s2

3- Cl- mass no- 35

atomic no - 17

no of neutrons- 18

electronic configuration - 1s22s22p63s23p5

4- K mass no- 39

atomic no- 19

no of neutrons- 20

electronic configuration- 1s22s22p63s23p64s1

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