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3 years ago

explain using diagrams how potassium forms the compound potassium flouride when it reacts with flourine

Chemistry

1 answer:

Katarina [22]3 years ago

7 0

Answer:

The answer to your question is given below.

Explanation:

Potassium (K) has 19 electrons with electronic configuration of 2, 8, 8, 1.

Fluorine (F) has 9 electrons with electronic configuration of 2, 7.

Fluorine needs 1 electron to complete it's octet configuration.

Hence, potassium (K), will lose 1 electron to fluorine (F) to form potassium ion (K+) with electronic configuration of 2, 8, 8. The fluorine atom (F) will receive the 1 electron from potassium to form the fluoride ion (F-) with electronic configuration of 2, 8.

**** Please see attached photo for further details.

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How many electrons are in the highest occupied energy level of these atoms?

Yuliya22 [10]

Excuse me not giving an explanation; I haven't even learned chemistry before. I usually give explanations for math/english.

I think it would be for flourine: 7
aluminum: 8
can't help with the rest...
sorry!

8 0

3 years ago

Moseley made revisions to the periodic table that resolved some of the problems with Mendeleev’s version. Which of these was a r

olga55 [171]

The result of Moseley's revisions were that the elements were arranged in atomic number order rather than atomic mass order.

5 0

3 years ago

Consider the following reaction: 2Mg(s)+O2(g)-->2MgO(s) delta H=-1204kJ

Pachacha [2.7K]

Answer:

a. The reaction is exothermic.

b. -87,9 kJ

c. 9,60g of Mg(s)

d. 602kJ are absorbed

Explanation:

Based on the reaction:

2Mg(s) + O₂(g) → 2MgO(s) ΔH = -1204kJ

a. The reaction is exothermic. Because ΔH<0. That means the reaction produces heat when occurs

b. 3,55g of Mg(s) are:

3,55g Mg × ( 1mol / 24,305g) = 0,146 moles of Mg(s)

As 2 moles of Mg(s) produce -1204 kJ of heat:

0,146 moles of Mg(s) × ( -1204kJ / 2mol Mg) = -87,9 kJ

c. If -238 kJ of heat were transferred. The moles of Mg(s) that react must be:

-238kJ × ( 2mol Mg / -1204kJ) = 0,395 moles of Mg(s). In grams:

0,395 moles × ( 24,305g / 1mol Mg) = 9,60g of Mg(s)

d. The reverse reaction is:

2MgO(s) → 2Mg(s) + O₂(g) ΔH = +1204kJ

40,5g of MgO(s) are:

40,5g MgO × ( 1mol MgO / 40,3044g) = 1,00 moles of MgO(s)

As 2 moles of MgO absorbe 1204kJ of energy:

1,00 moles of MgO(s) × ( +1204 kJ / 2mol MgO) = 602kJ are absorbed

I hope it helps!

7 0

3 years ago

Which scientist developed the first model of the atom that showed the structure of the inside of an atom

Eduardwww [97]

Answer:

Which scientist developed the first model of the atom that showed the structure of the inside of an atom

Ernest Rutherford

8 0

2 years ago

IceJOKER [234]

Answer:

1. The balanced equation is given below:

C4H6O3 + H2O → 2C2H4O2

The coefficients are: 1, 1, 2

Explanation:

C4H6O3 + H2O → C2H4O2

The above equation can be balanced as follow:

There are 4 atoms of C on the left side and 2 atoms on the right side. It can be balance by putting 2 in front of C2H4 O2 as shown below:

C4H6O3 + H2O → 2C2H4O2

Now, the equation is balanced as the number of atoms of the different elements present on both sides of the equation are equal.

The coefficients are: 1, 1, 2

5 0

3 years ago