Chemistry, 22.09.2019 08:30 kaylaelaine18

Neutral atoms of neon (atomic number 10) have the same number of electrons as each of the following except:
na^+
mg^+2
f^-
ar
0^-2

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Answer from: bryson9604

The answer would be : Ar.

Hope this helps !

Photon

Answer from: NeemIsGreen

Answer : The correct option is, Ar

Explanation :

(1) The element is, Na^+

Atomic number of Na = 11

The general electronic configuration of Na is, 1s^22s^22p^63s^1

The electronic configuration of Na^+ is, 1s^22s^22p^6

The number of electrons in Na^+ = 10

(2) The element is, $Mg^{2+}$

Atomic number of Mg = 12

The general electronic configuration of Mg is, 1s^22s^22p^63s^2

The electronic configuration of $Mg^{2+}$ is, 1s^22s^22p^6

The number of electrons in $Mg^{2+}$ = 10

(3) The element is, F^-

Atomic number of F = 9

The general electronic configuration of F is, 1s^22s^22p^5

The electronic configuration of F^- is, 1s^22s^22p^6

The number of electrons in F^- = 10

(4) The element is, Ar

Atomic number of Ar = 18

The general electronic configuration of Ar is, 1s^22s^22p^63s^23p^6

The number of electrons in Ar = 18

(5) The element is, $O^{2-}$

Atomic number of O = 8

The general electronic configuration of O is, 1s^22s^22p^4

The electronic configuration of $O^{2-}$ is, 1s^22s^22p^6

The number of electrons in $O^{2-}$ = 10

From this we conclude that, the option 1, 2, 3 and 5 have the same number of electrons as the neutral atom of neon. While in 'Ar' there are 18 number of electrons.

Hence, the correct option is, Ar

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

Answer from: Quest

shield volcanos are angry and get mad over the smallest things so much that there heads erupt pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its peaceful thing and knows how to control its emotions.

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Neutral atoms of neon (atomic number 10) have the same number of electrons as each of the following...