Which of the following is an extremely reactive family of elements?a. noble gases
c. carbon family
b. halogens
d. metalloids

Answers

Answer 1

Answer:

Answer:

b. Halogens

Explanation:

Chemical reactions are associated with the 'breaking' of old bonds and formation of new bonds. Since valence electrons are the ones that participate bonding, therefore the reactivity of elements must depend on the ease with which these electrons can be lost or gained.

Noble gases have fully filled (n²np⁶) valence electron configuration and are highly stable and inert.

Carbon family have less that half filled p-orbitals (ns²np²) in their valence configuration and are not very reactive. Metalloids have their reactivity in between metals and non-metals.

Halogens in contrast have a valence electron configuration of ns²np⁵. They only need one more electron to complete their octet and become stable. As a result they are highly reactive i.e. they readily attract electrons and form new bonds.

Answer 2

Answer: The halogens are extremely reactive, because they only need ONE MORE valence electron till they become stable, meaning they would bond and be very reactive.

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In which type of chemical reaction do two or more substances combine to form one substance? A) synthesis
B) decomposition
C) single replacement
D) double replacement

Answers

The reaction in which two or more substances combine to form one substance is called a synthesis reaction, Option A is the correct answer.

What do you understand by a synthesis reaction ?

The reaction in which two or more molecules combine to form one or more different molecule is called a synthesis reaction.

These are also called as Combination Reaction.

Example Synthesis reaction of Ammonia from Hydrogen and Nitrogen , known as Haber's Process.

3H₂ + N₂-----> 2NH₃

This reaction takes place at high temperature and pressure.

Therefore , The reaction in which two or more substances combine to form one substance is called a synthesis reaction, Option A is the correct answer.

To know more about Synthesis Reaction

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a) synthesis reaction

Mercury is a liquid meteal but it is not hard? how can we say it is a metal

Answers

What's the problem ? Hardness is not the definition of a metal. You need to expand your thinking. EVERY element is solid, liquid, and gas, over different ranges of temperature ... including all of the metals. There are only TWO elements that are liquid AT ROOM TEMPERATURE, and mercury is one of them. But on a mild day at the south pole, mercury is solid too.

How do you calculate the number of moles when given the number of particles?

Answers

Answer:

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What happens if you don't get nutrients in your body

Answers

You body starts to shut down! Hope this helped!

You begin to suffer from malnutrition

What interacted directly with the photographic plates to cause images in Becquerel’s experiment?A...uranium salt

B...radiation

C...unstable nuclei

D...radioisotopes

Answers

Answer: A. uranium salt

Becquerel made a conclusion that it was the uranium that causes the images found in the photographic plates. Though his theory was disproved during the first time,he continued to develop it. Then, it is through this experiment that Becquerel discovered radioactivity.

Answer:

a on edge 2021

Explanation:

a block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. it has a mass of 213 g. what is its density? a. 638 g/cm3 b. 6240 g/cm3 c. 0.0773 g/cm3 d. 7.89 g/cm3