How do you calculate atomic mass? Does this have anything to do with the number of protons/neutrons??

Question

Any example would be great!

Answer 1

The atomic mass is the number of protons plus the number of neutrons in the nucleus of the atom. The electrons are not counted since it takes 1800 electrons to equal the mass of one proton, and no known atom has any where near that number of electrons.

Li = 3 p and 4 n. Its mass is 7

Na = 11 p and 12 n. Its mass is 23.

Answer 2

the atomic mass is found in the periodic table it is simply the number of protons/atomic number and neutrons

example: what is the atomic mass of an element with an atomic number of 12 and neutron number of 7. basically, the atomic mass= 12+7=19

(N.B: the atomic mass is the upper case of a symbol of a certain element (A))

Answer 3

Add the number of protons with the number of neutrons. The mass of electrons is too insignificant to consider when determining the atomic mass. 1 proton=1amu and 1 neutron=1amu.

Answer 4

add the number of protons with the number of neutrons....the (number of protons corresponds with an elements atomic number.....) many atoms have the same number of neutrons as protons but def. not always

Answer 5

1 proton = 1 neutron = 1 Amu
1 electron = 1/1800 amu (i think)

Answer 6

add them.