9 янв. 2020 г. · The atomic number of argon is 18 and that of potassium is 19. Thus, argon has been placed before potassium.

24 сент. 2020 г. · Argon nucleus contains 18 protons and 22 neutrons. So, it's atomic no is 18 and Mass Number is 40. But Potassium contains 19 protons and 20 neutrons. Why can argon weigh more than potassium if it has a lower ... Which atom has a smaller atomic mass, Ar or K? - Quora Why do argon and calcium have the same atomic mass? - Quora Why does Argon have an atomic mass number of 40 but its ... Другие результаты с сайта www.quora.com

Argon has an atomic number (Z) of 18, while potassium has an atomic number (Z) of 19.

Atomic Mass of First 30 Elements ; 18, Argon, 39.948 ; 19, Potassium, 39.098 ; 20, Calcium, 40.078 ; 21, Scandium, 44.956.

2 нояб. 2019 г. · Atomic number of Argon is 18 and atomic number of Potassium is 19. Whole number atomic mass of Argon is 40 and whole number atomic mass of Potassium is 39.

Argon, 39.95(16), 1, 2, 5. 19, K, Potassium, 39.0983(1). 20, Ca, Calcium, 40.078(4). 21 ... The value enclosed in brackets, e.g. [209], indicates the mass number ...

State giving reason why argon(atomic mass =39.94) has been rightly placed before potassium (atomic mass=39.01) in the Modern Periodic Table.

Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon fluorohydride · Category:Argon · Argon dating · Argon compounds

Atomic Mass of Elements From 1 to 30 ; 18. Argon. 39.948 ; 19. Potassium. 39.098 ; 20. Calcium. 40.078 ; 21. Scandium. 44.956.