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zhenek [66]
3 years ago
6

Find the valence shell electronic configuration of element belonging to group 8a and period 4

Chemistry
1 answer:
Semmy [17]3 years ago
8 0

Answer:

2.8.8.

Explanation:

The element belonging to Group 8a and period 4 is Krypton, which has 18 electrons. The valence shell electronic configuration for the first 20 elements is 2.8.8.2 so Krypton's valence shell electronic configuration would be 2.8.8. only.

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Tertiary alkyl halides show SN1 reactions mostly...... Why?
ankoles [38]

Answer:

Generally SN1 reactions are carried out in polar protic solvents. The energy required for breaking the C-X bond is obtained through solvation of halide ion with the proton of the solvent. Tertiary alkyl halides undergo SN1 reaction very fast because of the high stability of tertiary carbocations.

6 0
3 years ago
Iron is a :<br><br>A. substance<br>B. heterogenous mixture<br>C. homogenous mixture​
wlad13 [49]

Answer:

a: iron is a substance

Explanation:

because its hard and brittle and classified as a metal

4 0
3 years ago
What are the forces plz help
Diano4ka-milaya [45]
The first 3 are pushes and the last one is a pull.

Hope this helps!
6 0
3 years ago
1. When you have 43 grams of sodium, how many grams of NaCl can you produce?
seropon [69]

Molar mass is the amount grams that one mole weighs.

Explanation: You need to find the molar mass of NaCl which is the same as the amu on the periodic table in grams. So it is 22.99(Na) + 35.45(Cl) = 58.44

You also know that for every mole of NaCl you have 1 mole of Na because every molecule of NaCl has 1 atom of Na.

Finally, using the periodic table, again, you see that the molar mass of Na is 22.99.

Then using stoichiometry, you can find the grams of sodium.

100(g NaCl) * 1 mol (NaCl)/58.44 g (NaCl) * 1 mol (Na)/ 1 mol (NaCl) * 22.99 (g of Na)/ 1 mol (Na)

which equals 39.339435 g of Na.

If you need to maintain significant figures the answer will be 40.

hope this helps

6 0
3 years ago
प्रश्न 01. बेकिंग सोडा बनाने के लिए आवश्यक सामग्री निर्माण की विधि एंव रासायनिक<br>समीकरण लिखिए।​
salantis [7]

Answer:

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6 0
3 years ago
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