Question

What is the valency of an element with atomic number 9 and mass number 19

Answer 1

Atomic number: 9

Element: fluorine

Atomic mass: 18

VALENCY:1

Answer 2

The valency of an element with atomic number 9 and mass number 19 is 1.

According to the International Union of Pure and Applied Chemistry, valency is "the highest number of univalent atoms (originally hydrogen or chlorine atoms) that may combine with an atom of the element under discussion, with a fragment, or for which an atom of this element can be substituted."

Explanation:

• The element with atomic number 9 in the modern periodic table is fluorine.
• F is the fluorine chemical symbol.
• Henri Moissan is credited with finding fluorine.
• Fluorine is a highly poisonous gas. It commonly appears as the fluoride ion F- in an aqueous solution.
• It lingers in the air for a time if it is attached to tiny particles. 2, 7, is the electrical configuration.
• The L-shell possesses seven electrons, compared to the k-two. Shell requires one more electron to complete the final shell in order to be stable or neutral. Gaining 1 electron by letting go of 7 electrons will be simple.

Fluorine, therefore, has a valency of 1.

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