The ion has eight valence electrons. the ion has eight valence electrons. cr6+ ni6+ fe6+ co6+ mn6+

1 answer:

7 0

Answer is: Cr⁶⁺.
₂₄Cr 1s²2s²2p⁶3s²3p⁶3d⁵4s¹.
₂₄Cr⁶⁺ 1s²2s²2p⁶3s²3p⁶. 8 valence electrons.
₂₈Ni 1s²2s²2p⁶3s²3p⁶3d⁸4s².
₂₈Ni⁶⁺ 1s²2s²2p⁶3s²3p⁶3d⁴.
₂₆Fe 1s²2s²2p⁶3s²3p⁶3d⁶4s²
₂₆Fe⁶⁺1s²2s²2p⁶3s²3p⁶3d².
₂₇Co 1s²2s²2p⁶3s²3p⁶3d⁷4s²
₂₇Co⁶⁺ 1s²2s²2p⁶3s²3p⁶3d³.
₂₅Mn⁶⁺ 1s²2s²2p⁶3s²3p⁶3d¹.

You might be interested in

A) 2Fe(s) + O2(g) =>

TiliK225 [7]

Answer: -22.2 kJ

Explanation:

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps. SGDSDGSDGSDGgsg

According to Hess’s law, the chemical equation can be treated as algebraic expressions and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

(1) $2Fe(s)+O_2(g)\rightarrow 2FeO(s)$ $\Delta H_1=-544.0kJ$

(2) $4Fe(s)+O_2(g)\rightarrow 2Fe_2O_3(s)$ $\Delta H_2=-1648.4kJ$

(3) $Fe_3O_4(s)\rightarrow 3Fe(s)+2O_2(g)$ $\Delta H=+1118.4kJ$

Reversing 1 ,2 and 3 and halving 1 and 2 and then adding we get net equation:

(4) $Fe_2O_3(s)+FeO(s)\rightarrow Fe_3O_4(s)$ $\Delta H_4=?$

$\Delta H_4=\frac{-\Delta H_1}{2}+\frac{-\Delta H_2}{2}+(-\Delta H_3)=\frac{544.0}{2}+\frac{1648.4}{2}+(-1118.4)=-22.2kJ$

Therefore, the heat of reaction, ΔH, for the reaction is -22.2 kJ

6 0

3 years ago

Why do different elements make different color flames when you burn them?

Dovator [93]

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

7 0

3 years ago

Is it possible for parents whose alleles for a dominant trait are homozygous dominant to have offspring with a homozygous recess

Fynjy0 [20]

The right answer for the question that is being asked and shown above is that: "TRUE." It is <span>possible for parents whose alleles for a dominant trait are homozygous dominant to have offspring with a homozygous recessive trait. This is true.</span>

8 0

4 years ago

Please help me I will give you the brain thing with extra points if you help me, please. I need to get this right. 9/10

CaHeK987 [17]

Answer:B

Explanation:

got an 90 on the test

8 0

3 years ago

Read 2 more answers

The formula C2H4 can be described as

Elden [556K]