what is the atomic mass number for gold...?

Answer 1

Atomic number - 79 Density g/mL 19 .3
Atomic weight u 196 .9665 Melting point K 1337 .58
Bonding radius A 1 .34 Boiling point K 3130
Atomic radius A 1 .79 Heat of vaporization kJ/mol 334 .4
Ionization Potential V 9 .225 Heat of fusion kJ/mol 12 .55
Electronegativity - 2 .54 Specific heat J/gK 0 .128
The oxide is amphoteric.
Crystal are face centered cubic.

Electron config. : [Xe] 4f14 5d10 6s1

Answer 2

The atomic number is 79.
The atomic mass number depends on the isotope that you are working with.
The atomic weight is and average of all the isotopes by percentage. For gold its 196.96
Many science teacher's when asking for Mass Number simply want you to round off this number to the nearest whole number..thus 197

Answer 3

Wanna to know atomic mass(weight) of Au(Gold)

Atomic number -79

Atomic weight of gold is 196 .9665

Answer 4

Atomic No:79

Isotope Half Life
Au-194 1.6 days
Au-195 186.1 days
Au-195m 30.5 seconds
Au-196 6.2 days
Au-197 Stable
Au-198 2.7 days
Au-199 3.14 days


Date of Discovery: circa 3000 BC
Discoverer: Unknown
Name Origin: From the Old English word geolo (yellow)
Symbol Origin: From the Latin word aurum (gold)
Uses: electronics, jewelry, coins
Obtained From: crust of the earth, copper ores

For all Atomic Numbers try this site:
www.chemicalelements.com/elements/au.html

Answer 5

The number is 197, assuming that it is standard with 118 neutrons. (79 protons and 118 neutrons add up to 197, the mass number)

The atomic number is the number of protons, 79
The atomic mass number is the sum of the protons and neutrons

Answer 6

Atomic Mass Number Of Gold

Answer 7

79

Answer 8

http://en.wikipedia.org/wiki/List_of_elements_by_number