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2 years ago

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The elements in Groups 1A(1) and 7A(17) are all quite reactive. What is a major difference between them?

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matrenka [14]2 years ago

6 0

The elements in Groups 1A(1) and 7A(17) are all quite reactive.

<h3>Major difference between Groups 1A(1) and 7A(17) : </h3>

Group 7's halogens, which are non-metal elements, become less reactive as you move down the group. In contrast to the alkali metals in Group 1 of the periodic table, this trend is the opposite. The most reactive element in Group 7 is fluorine.

Alkali metals are soft and reactive metals. They react vigorously with water and become more reactive. And other hand halogens are reactive non metals.

Elements of group 1A are known as alkali metals. Elements of this group are lithium, sodium, potassium, rubidium, cesium.
Reactivity increase down group 1 but decrease up group 7 this is because group 7 elements react by gaining an electron. As one move down the group, the amount of electron shielding increases, meaning that the electron is less attracted to the nucleus.

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The reaction can be written as:

Ni+4CO ⟶ $Ni(CO)_{4}$

V(CO)=3.55 $m^{3}$

T=50°C=323.5K

p=100700Pa

Now, use the formula:

pV=nR*T

Where, P is pressure, V is volume and T is temperature. n=p∗V / R∗T

n=100700∗3.55 / 8.314∗323.15

It is known that,

n(CO)=133.059mol

n(Ni)=n(CO)/4=33.26mol

Mass can be determined by the formula:

Mole = mass / molar mass

Now, put the value of given data in above formula:

m(Ni)=nAr=33.26mol/58.69g/mol

m(Ni)=1952.31g

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Iron reacts with oxygen gas to produce iron (III) oxide. If there are 52 grams of

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Mass of Fe₂O₃ : 74.26 g

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<h3>Further explanation</h3>

Reaction

4Fe (s) + 3O₂ (g) ==> 2Fe₂O₃ (s)

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3 years ago

The following redox reaction is conducted with [Al3+] = 0.12 M and [Mn2+] = 1.5 M.

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