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BlackZzzverrR [31]
2 years ago
5

It’s about the periodic table of elements

Chemistry
1 answer:
Pie2 years ago
3 0
Yes what the other person said can I plz get an thanks
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3. How many molecules are in 2.10 moles of H2O?
AnnZ [28]

Answer:

<h2>1.264 × 10²⁴ molecules</h2>

Explanation:

The number of molecules can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 2.10 × 6.02 × 10²³

We have the final answer as

<h3>1.264 × 10²⁴ molecules</h3>

Hope this helps you

5 0
3 years ago
Which ion has the smallest radius?<br> (1) O2-<br> (2) S2-<br> (3) Se2-<br> (4) Te2-
podryga [215]

Answer:


                  Option-1 (O²⁻) is the correct answer.


Explanation:

                       All given anions contains same charge. So, we can ignore the effect of charge on these anions.


As we know all given compounds belongs to same group (Group 6) in periodic table. And from top to bottom along the group the elements are placed as,


                                                          Oxygen O


                                                          Sulfur S


                                                          Selenium Se


                                                          Tellurium Te


Hence, moving from top to bottom along the group the number of shells increases. And with increase in number of shell the atomic or ionic radii increases. As Oxygen is present at the top of the group, therefore, it has the smallest radius due to less number of shells.

5 0
3 years ago
Read 2 more answers
Acids containing polyatomic ions are named according to the name of the anion.​ true or false
Ray Of Light [21]

Answer:

true

Explanation:

Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them. For an acid with a polyatomic ion, the suffix “-ate” from the ion is replaced with “-ic.”

5 0
3 years ago
Because Mg and O2 are both elements, no bonds were broken during the formation of MgO.
masya89 [10]

Answer:

false

Explanation

The chemical bonds were broken when creating the compound MgO.

4 0
3 years ago
Read 2 more answers
I have some question on Alef website
elena55 [62]

Answer: lava, crater

Explanation:

5 0
2 years ago
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