Fluorine is a gas element. atomic number of it is 9.
The answer is Fluorine!Argon, one of the noble gases.
Atomic number 9 - a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite. Source: The Free Dictionary by Farlex
Fluorine is a non metal element. Atomic mass number of it is 19.
Pottasium is a metal element. atomic number of it is 19.
The atomic mass 19 is for fluorine, the ist member of halogens it exists as F2,a diatomic gas.
The atomic number indicates the number of protons (19) and electrons (19).
Pottasium is a meta element. Atomic number of it is 19.
Symbol: F Atomic Number:9 Atomic mass: 18.998 Mass Number: 19 Number of Protrons: 9 Number of Electrons: 9 Number of Neutrons: 10
Pottasium is a meta element. Atomic number of it is 19.
Only elements have a particular (unique) atomic number. Potassium (K) has 19 and chlorine (Cl) has 17 as atomic number (= proton number)