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3 years ago

Which has the largest atomic radius calcium bromide barium and astatine

Chemistry

2 answers:

Fantom [35]3 years ago

7 0

The one with the largest atomic radius is barium

Hoped this helped:)

gavmur [86]3 years ago

6 0

Answer : Barium has the largest atomic radius.

Explanation :

The periodic trend observed with respect to atomic radius is explained below.

Across a period : As we move from left towards right across a period, atomic radius decreases.

This happens because as we move towards right, an extra electron gets added to the same shell. But as we move towards right, the effective nuclear increases. As a result nucleus pulls the outer electrons more strongly which results in shrinking of the atom.

Down the group : As we move down the group, the atomic radius increases.

Because as we move down, an extra shell gets added to the atom. Due to this size of the atom increases.

If we look at the positions of the given elements , we see that Calcium and Bromine are present in fourth period whereas Barium and Astatine are present in sixth period.

According to periodic trend observed for group, Barium and Astatine would have larger atomic radii than Calcium and Bromine.

If we apply periodic trend observed across a period, we can say that Barium is larger than Astatine because it is more towards left .

Therefore the atom with largest radius is Barium.

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Isopropyl alcohol is mixed with water to produce a 35.0 % (v/v) alcohol solution. How many milliliters of each component are pre

PilotLPTM [1.2K]

229.25 mL of isopropyl alcohol

425.75 mL of water

Explanation:

Knowing that the solution have a 35.0 % (v/v) isopropyl alcohol in water, we can calculate the volume of each component as following.

volume of isopropyl alcohol = (35/100) × solution volume

volume of isopropyl alcohol = 0.35 × 655 mL = 229.25 mL

Now, knowing the volume of isopropyl alcohol we can determine the volume of water.

volume of the solution = volume of isopropyl alcohol + volume of water

volume of water = volume of the solution - volume of isopropyl alcohol

volume of water = 655 mL - 229.25 mL = 425.75 mL

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3 0

3 years ago

Is ice melting in a drink a chemical change?

konstantin123 [22]

Nope, it's a physical change. When ice melts it changes into liquid water, it's still water. Changes in which no new substances are formed are physical changes, hence this is a physical change.

6 0

3 years ago

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large

garri49 [273]

Answer:

large atoms

Explanation:

its kinda obvious

4 0

2 years ago

Read 2 more answers

Which of the following is an example of a pure substance? *

Natali [406]

Answer:

Iron shavings

Explanation:

A substance that has a fixed chemical composition throughout and a mixture is when two or more substances are combined, but they are not combined chemically.

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2 years ago

The reaction of pyrrole with bromine forms predominantly __________. View Available Hint(s) The reaction of pyrrole with bromine

xenn [34]

Answer:

a) 2-bromopyrrole

Explanation:

Our options for this questions are:

a) 2-bromopyrrole

b) 2,3-dibromopyrrole

c) N-bromopyrrole

d) 3-bromopyrrole

To understand how the reaction works we have to start with the resonance structures. (Figure 1), on these structures, we will obtain a negative charge on carbon 2 in the pyrrole ring, therefore on this carbon we can generate an attack to an electrophile.

The second step is to check how the mechanism take place. An electrophile is generated by the $Br_2$ and $FeBr_3$ . This electrophile can be attacked by the negative charge on carbon 2 producing the 2-bromopyrrole. (See figure 2).

I hope it helps!

5 0

3 years ago