It is called subscript indicating the number of atoms.
Explanation:
The chemical compound is formed by two or more elements.
The compound is formed by the sharing, accepting or donating the electrons.
The compound formed by two elements will have different valencies of cations and anions.
In chemical formula of compound specific number of atoms of each element are present.
eg: H2O (2 atoms of hydrogen bonded with one atom of oxygen)
NaCl (1 atom of sodium and one atom of chloriine are bonded.)
NaHCO3 ( 1 atom of sodium, 1 atom of hydrogen, 1 atom of carbon and 3 atoms of oxygen.)
Ammonia is a hydride,(Nitrogen hydride). It is also a base and <span>because it is a soluble base it is an alkali</span>
Answer:
Explanation:
In this lesson we will learn the three basic parts of all cells. Cells have something called a cell membrane, a nucleus, and cytoplasm.
Answer:
The correct answer is - D. All rocks were molten in that time period.
Explanation:
The early Precambrian era began 4.6 billion years ago. The formation of eath start from this era with dust and gas. The atmosphere at that time was too hot. It was like hades. The rocks were molten and appear to like an ocean of rocks.
Due to the molten rocks, there are no samples of rock from this area as it was too hot to be formed. There were boiling sulfur and gases were everywhere.
