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Given that an atom X has an atomic number of 19 and a relative atomic mass of 39:

i) How many electrons, protons, and neutrons are present in atom X?

ii) How many electrons are likely in the outer energy level (shell) of atom X?

iii) Suggest a symbol for the ion that would be formed from atom X upon ionization.

iv) To which group of the periodic table can atom X be expected to belong?

v) Write the electron configuration of atom X using both the mathematical and quantum mechanics approaches.



Answer :

GinnyAnswer

Final answer:

This answer provides detailed information on the protons, neutrons, electrons, valence electrons, ion symbol, periodic table group, and electron configuration of atom X.


Explanation:

Protons: 19
Neutrons: 20
Electrons: 19

Valence electrons are the outermost electrons. In atom X with 19 electrons, the outer energy level likely has 1 electron.

Upon ionization, atom X would form an ion with a +1 charge, so the ion symbol would be X+.

Atom X, with atomic number 19, belongs to Group 1 of the periodic table known as the alkali metals.

Electron configuration using the mathematical approach: 1s2 2s2 2p6 3s2 3p6 4s1 and quantum mechanics approach: [Ne] 3s2 3p6


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