In general for main-group elements, atomic size _ from left to right across a period and _ down a group.

Chemistry

1 answer:

liberstina [14]2 years ago

8 0

Answer:

decreases, increases

Explanation:

In general for main-group elements atomic size decreases from left to right across a period and increases down a group

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How many grams of fluorine must be reacted with excess lithium iodide to produce 10.0 grams of lithium fluoride?

rewona [7]

Answer:
7.32 g of F₂

Solution:
The equation is as follow,

2 LiI + F₂ → 2 LiF + I₂

According to equation,

51.88 g (2 mole) of LiF is produced from = 37.99 g (1 mole) F₂
So,
10 g of LiF will be produced by = X g of F₂

Solving for X,
X = (10 g × 37.99 g) ÷ 51.88 g

X = 7.32 g of F₂

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What happens when a metal is reduced. Give an example of a metal being reduced

AlexFokin [52]

Answer:

The oxidation number of the metal decreases

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Explanation:

When an element gains electron, the element becomes reduced, hence when a metal is reduced, the metal gains electrons, which reduces the oxidation number of the metal

An example of a metal being reduced is;

2 Al + Fe₂O₃ → Al₂O₃ + 2 FeO

In the above reaction, the iron (III) oxide is reduced to iron (II) oxide by aluminium metal.

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Have a nice day!

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3 years ago

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In general for main-group elements, atomic size _____ from left to right across a period and _____ down a group.

In general for main-group elements, atomic size _ from left to right across a period and _ down a group.