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frez [133]
3 years ago
12

What is the formula of a compound formed between iodine (I) and calcium (Ca)?

Chemistry
2 answers:
bixtya [17]3 years ago
8 0

<u>Answer:</u> The chemical formula for the compound will be CaI_2

<u>Explanation:</u>

Calcium is the 20th element of the periodic table having electronic configuration of [Ar]4s^2

This element will loose 2 electrons and thus shows an oxidation state of +2 units.

Iodine is the 53rd element of the periodic table having electronic configuration of [Kr]5s^24d^{10}5p^5

This element requires 1 electron and thus shows an oxidation state of -1 units.

So, by criss-cross method, the oxidation state of the ions will get exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Hence, the chemical formula for the compound formed will be CaI_2

Nadya [2.5K]3 years ago
7 0
Calcium iodide (chemical formula <span>CaI2</span>)
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65.39<br>Atomic # =<br>Atomic Mass =<br># of Protons =<br># of Neutrons =<br># of Electrons =​
ratelena [41]

Answer:

The answer to your question is below

Explanation:

Atomic mass = 65.39 g

Searching this number in the periodic table we find that the element is Zinc.

Then:

# of Protons = 30

# of neutrons = atomic mass - # of protons

                       = 65.39 - 30

                        = 35.39

# of electrons = # of protons = 30

8 0
3 years ago
Can someone help with question 16? <br> ASAP
Flura [38]

1. carbon lies in the 2nd period where silicon in the third period.

2. carbon is a non metal whereas silicon is a metalloid.

3. there are only 3 isotopes of carbon and 23 isotopes of silicon

4. size of silicon atom is larger

5. silicon is heavier than carbon.

4 0
3 years ago
Draw an atomic structure of Sodium (Na). What are sub-atomic particles?​
xxMikexx [17]

Sodium represents by the (Na).

7 0
1 year ago
Please help need ideas for lab report
dem82 [27]

Answer:

Objectives(s):  

In your own words, what is the purpose of this lab?  

To teach me about chemical compounds  

 

Hypothesis:  

In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment. If you combine two certain compounds, then it will make a new compound.  

 

 

Procedure:  

The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.  

 

 

Data:  

Record the composition of each of your compounds below. Be sure to include the number of atoms for each element. An example has been supplied for you.  

 

 

Compound Name  

Chemical Formula  

Sodium (Na)  

Atoms  

Calcium (Ca)  

Atoms  

Hydrogen (H)  

Atoms  

Oxygen (O)  

Atoms  

Carbon (C)  

Atoms  

Chlorine (Cl)  

Atoms  

Ex: Sodium  

hypochlorite  

NaClO  

1  

0  

0  

1  

0  

1  

Carbon Tetrachloride  

CCl4  

0  

0  

0  

0  

1  

1  

Water  

H2O  

0  

0  

1  

1  

0  

0  

Calcium Hydroxide and Hydrogen Gas  

Ca(OH)2 + H2  

0  

1  

1  

1  

0  

0  

Sodium Hydride  

NaH  

1  

0  

1  

0  

0  

0  

Sodium Hydroxide  

NaOH  

1  

0  

1  

1  

0  

0  

Chlorine Dioxide  

ClO2  

0  

0  

0  

1  

0  

1  

Hydrogen Chloride  

HCl  

0  

0  

1  

0  

0  

1  

Table Salt  

NaCl  

1  

0  

0  

0  

0  

1  

Bleach  

NaClO  

1  

0  

0  

1  

0  

1  

 

Conclusion:  

Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.  

Using two to three sentences, summarize what you investigated and observed in this lab. I investigated how chemical compounds work and what to use to put them together.  

Why do you believe knowing how elements and compounds react together is essential in everyday matters? So, you can cook and stop injuries, these two things happen a lot in day-to-day life.  

Some elements are more "reactive" than other elements; why do you think this is? Because certain elements in the compound may react more to fire or water and many other elements.  

Choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. Because if you add all the atoms, put in that’s the total amount. For example, water has one hydrogen atom and one oxygen atom, so water has two atoms.  

Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds, or do we have many compounds in this world? Yes, it is possible like water and hydrogen peroxide. The formula of water is H20 but hydrogen peroxide has one more oxygen-H202.  

Explanation:

7 0
2 years ago
What is the reason for heat transfer from one substance to another? A. difference in pressure B. difference in volume C. differe
gulaghasi [49]

Answer

C. Difference in temperature

Explanation

According to thermodynamics, heat transfer occurs when heat from a high temperature reservoir moves to a low temperature reservoir. For heat to be transferred, the two objects should have different temperatures with one having more temperature than the other. Heat transfer in solids is by conduction, in fluids is by convection and by radiation.

4 0
3 years ago
Read 2 more answers
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