Question

the configuration of reactive metal is​

Answer 1

Answer:

The reactivity series of metals, also known as the activity series, refers to the arrangement of metals in the descending order of their reactivities. ... Metals tend to readily lose electrons and form cations. Most of them react with atmospheric oxygen to form metal oxides.

Step-by-step explanation:

A):Fluorine. [He] 2s2 2p5. Neon. [He] 2s2 2p6. Sodium.

B):Argon. [Ne] 3s2 3p6. Potassium.

C):Neon is followed by Argon (Ar) , which has an atomic number of 18 ( 10+8 ). So the element with configuration (Ar) 4 s - 2 has atomic number 18+2=20. With prior knowledge of the periodic table, one can identify the element as Calcium (Ca -20).

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