Question

the mass number of an element is 19 it has 5 electrons in its l shell then what is its atomic number find the number of neutrons is it a metal or a nonmetal​

Answer 1

The element you are talking about is Flourine. It is a non-metal and it has ten neutrons.

Answer 2

Answer:

The substance you're referring to is Fluorine. It possesses 10 neutrons and is a non-metal.

Explanation:

• The elements that absorb or gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6 or 7 electrons.

• Nonmetals lack malleability and ductility, are often poor heat and electricity conductors, and many of the basic nonmetals are gases at room temperature. Other nonmetals can also be liquids or solids.

• The first element in the periodic table's Halogen group (group 17) is fluorine (F). It has an atomic weight of 19, an atomic number of 9, and is a gas at room temperature. Given that it is the top element in the Halogen Group, it is the most electronegative element and hence most reactive. It is one of the few nonmetals and non-metals that may form diatomic molecules $(F_{2} )$. The 2p level of it has 5 valence electrons. $1S^{2} 2S^{2} 2P^{5}$ describes its electron configuration. Since it is exceedingly electronegative and a powerful oxidizer, it frequently forms the anion F-. Since fluorine is a weak acid Lewis acid, it takes electrons during reactions. There are several stable isotopes of fluorine, but only F-19 is found in nature.

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