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prisoha [69]
3 years ago
5

How many valence electrons does selenium have?

Chemistry
1 answer:
Rasek [7]3 years ago
7 0

Answer:

six electrons

Explanation:

The six electrons in the outermost shell allow selenium to have a variety of valence numbers. Selenium compounds have been found that have valences of -2, 4, and 6. Speaking of the number six, selenium is found to have six naturally occurring isotopes.

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1) Choose the correct statement from the options below.
Elena L [17]

<u>Answer:</u>

For 1: The correct answer is Option D.

For 2: The correct answer is Option A.

<u>Explanation:</u>

  • <u>For 1:</u>

Polar molecules are defined as the of molecules, in which two atoms that combine must be of different element and therefore can create a dipole. For a dipole, there must be a difference in electronegativity and that is achieved when two atoms of different electronegativity combine. The negative dipole or charge is created on the electronegative atom and positive dipole or charge is created on the electropositive atom.

Thus, the correct answer is option D.

  • <u>For 2:</u>

Non-polar molecules are defined as the molecules which are formed when two atoms of same element combine, so that a dipole cannot be created. When there is no dipole, there will be no difference in electronegativity and this is achieved when two atoms of same electronegativities combine.

Thus, the correct answer is A.

3 0
3 years ago
Read 2 more answers
How do you calculate wavelength and frequency?​
Vladimir [108]

Answer:

Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v/f.

Explanation:

Just a formula that's commonly used in biology.

5 0
3 years ago
10095 m/sec to mile/ sec. 1 km = 0.6214 mile
Anarel [89]

Answer:

Explanation:

to convert any value in miles per second to meters per second, just multiply the value in miles per second by the conversion factor 1609.344. So, 10095 miles per second times 1609.344 is equal to 1.625 × 107 meters per second.

4 0
4 years ago
2000 km/sec. Convert that to<br> m/sec.
koban [17]

Answer:

2000 km/sec

1km=1000m

2000×1000

2000,000 m/sec

4 0
4 years ago
Which characteristic of atoms is the basis for the order on the Periodic Table?
il63 [147K]
The answer is c atomic number
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3 years ago
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