monkeys450
17.02.2021 •
Chemistry
The__is the source of energy used in photosynthesis?
A. Sun
B. Radiant energy
C. Chemical energy
If you can help I would really appreciate it!:)
Solved
Show answers
More tips
- G Goods and services Stock center - a modern way of optimizing logistics...
- F Food and Cooking How to Properly Wash a Down Jacket? Tips from Experts...
- C Computers and Internet Thin Client: What It Is and Why You Need It?...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Chemistry
- C Chemistry The volume of a sphere is measured as V - Şarl Find the volume of a sphere with a radius of 6 and letting a = 3,14 O 8138.88cm O 904.32cm O 678 24cm O 75,36cm...
- S Spanish ¿cuál es un ejemplo de preservación del medioambiente del chaco?...
- M Mathematics Five gallons of lemonade cost $8.00 which is rate of per...
- M Mathematics What are the ordered pairs of the solutions for this system of equations?...
- M Mathematics The circumference of a circle is22 cm find the radiusof the circle...
Ответ:
sun
Explanation:
source means where it comes from and the source of energy comes from the sun
Ответ:
Ответ:
B. The atom has more than eight valence electrons before bonding.
Explanation:
Expansion of the octet rule occurs only with atoms of non-metallic elements from the third period onwards, ie having three or more electronic layers. This is because these atoms have empty orbitals that can accommodate 10, 12 or more electrons. These atoms have more than eight valence electrons before bonding.
An example of a chemical element whose atoms may contract is phosphorus (P), which belongs to family 15 or VA of the periodic table. This means that it has five electrons in the valence shell and, according to the octet theory, should receive three more electrons to be stable with eight electrons. However, the phosphorus is the element can be the central element of a compound and for this reason it makes five covalent bonds with four carbon atoms. Since the phosphorus atom shares five pairs of electrons, it has a total of ten electrons in the valence shell, meaning it did not follow the octet rule, but there was an expansion of its octet.