Na, Ba, Cs and Ni are metals.
Noble gases
also known as Inert gases
Explanation:
the last CH2 should CH3
because the first and last carbons are bonded to three hydrogens
Answer:
I think the insect would be the one in the second photo reading from left to right
Explanation:
the other insects:
the first of the first photo is a change of what would be the external surface of the insect, it is not the insect itself.
In the third photo, the insect has short legs with little grip, which indicates that it does not climb large areas on top, and finally, the 4 image is of an insect that lives in desert areas and is poorly coordinated in areas of high heat. and sand.
These are the reasons why I chose photo number two reading from left to right
Answer:
Dmitri Mendeleev
Explanation:
Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts proved to be correct