Chlorine.............|.......171.60.......................|...239.11
Bromine.............|........265.80......................|...332.0
Iodine................|........386.85......................|....457.40
Astatine.............|..........575..........................|.....610(?)
The element with the lowest atomic number in period 3 is sodium (Na) with an atomic number of 11.
The element with the lowest atomic number is hydrogen.
Atomic number: The number of protons in an atomic nucleus. (http://www.answers.com/topic/atomic-number) So the lowest atomic number is 1, which is hydrogen, as you cannot have an element with less than one proton.
Of elements that have no stable isotopes, technetium has the lowest atomic number, which is 43.
The atomic number of an element is how many protons is in it. So the chart is arranged lowest atomic number to highest.
Hydrogen is a non metal element. Atomic number of it is 1. It is the element with lowest atomic number.
The element with the lowest atomic number in period 3 is sodium (Na) with an atomic number of 11.
The element with the lowest atomic number is hydrogen.
Hydrogen is a none metal element. atomic number of it is 1.
The element with the lowest atomic number among the transuranium elements is neptunium, with an atomic number of 93. It is the first transuranium element produced synthetically in a laboratory setting.
The solid element with the lowest atomic number is lithium, with an atomic number of 3.
Berylium is a non metal element. Atomic number of it is 4.
Technetium (atomic number 43) is the inner transition metal with the lowest atomic number.
Beryllium has the lowest atomic number among the alkaline earth metals.
what is boron
Oxygen is the element having atomic number 8. It is present in group-16.
Atomic number: The number of protons in an atomic nucleus. (http://www.answers.com/topic/atomic-number) So the lowest atomic number is 1, which is hydrogen, as you cannot have an element with less than one proton.