Trends in Electronegativity

 (i).  Down The Group

Down the group atomic size increases and hence electronegativity decreases.

(ii).  Along The Period

Along the period, atomic size decreases and hence electronegativity increases.

IUPAC Nomenclature of Elements with Z > 100

IUPAC in 1997 suggested the rules for naming the elements with Z > 100. The main points of this nomenclature are;

1.  The names are derived directly from atomic numbers using numeral roots for 0 to 9 and adding suffix-ium. The roots for number 0 to 9 are;

Digit	0	1	2	3	4	5	6	7	8	9
Root	nil	un	bi	tri	quad	pent	hex	sept	oct	enn
Abbreviation	n	u	b	t	q	p	h	s	o	e

2.  The names are shortened if there is repetition of a word e.g. bi ium and tri ium are written as buim & trium etc.

3.  The symbol of element is obtained from first letters of the roots of number which make up atomic number of element. E.g. the name of element with atomic number 102 would be unnilbium. Thus its symbol is Unb (u for un, n for nil and b for bi).

Z

NAME	SYMBOL	Z	NAME	SYMBOL
101	Unnilunium	Unu	111	Unununium	Uuu
102	Unnilbium	Unb	112	Ununbium	Uub
103	Unniltrium	Unt	113	Ununtrium	Uut
104	Unnilquadium	Unq	114	Ununquadium	Uuq
105	Unnilpentuim	Unp	115	Ununpentium	Uup
106	Unnilhexium	Unh	116	Ununhexium	Uuh
107	Unnilseptium	Uns	117	Ununseptium	Uus
108	Unniloctium	Uno	118	Ununoctium	Uuo
109	Unnilennium	Une	119	Ununennium	Uue
110	Ununnilium	Uun	120	Unbinilium	Ubn