Answer:
Of the 92 natural elements, 25 are essential for life. Of these, there are six main elements that are the fundamental building blocks of life. They are, in order of least to most common: sulfur, phosphorous, oxygen, nitrogen, carbon, and hydrogen.
Explanation:
Mono and di are Greek numbers, mono means one, mostly u will find it for the thing which is like ONE, (Idk) Like, in maths you use Monomials,, which meAns one term, so like that.... and DI means two , mostly you will find it for two things,,, like in Science, DIoxide,,, so you need to oxides to make dioxide,, CARBON-DIOXIDE,,,
HOPE THIS HELPS!
Answer:
Chemical families on the periodic table are the following:
1) Alkali metals.
2) Alkaline earth metals.
3) Transition metals.
4) Halogens.
5) Noble gases
Explanation:
Alkali metals are those elements having one electron in the outermost shell. Alkaline earth metals are found in the earth such as calcium. Halogens means salt forming, it produces salts when combine with alkali. Noble gases are those which are non-reactive in nature.
Answer:
First filial generation.
Explanation:
Mendel is known as the father of genetics. He formulated the law of segregation and law of independent assortment by working on the pea plant.
The Mendel first crossed the pure breed line parents and obtained the first filial generation. The F1 generation is obtained by the cross breeding of the parental generation.
Thus, the correct answer is option (D).
