Question

What is meant by in a periodic table

[a] group
[b] period
[c] transition elements

2] Explain the orbital structure of methane

3] Briefly describe the experiment which led to the discovery of nucleus​

Answer 1

Answer:

a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

Answer 2

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2.Methane is a simplest of the saturated hydrocarbons with a chemical formula CH4. It consists of four hydrogen atoms and one carbon atom and is the simplest alkane. When natural methane reaches the surface of the atmosphere is called atmospheric methane and can be found under the seafloor as well as below the ground.

3.Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.