Asodium atom (z = 11) contains 11 protons in its nucleus. strictly speaking, the bohr model does not apply, because the neutral atom contains 11 electrons instead of a single electron. however, we can apply the model to the outermost electron as an approximation, provided that we use an effective value zeffective rather than 11 for the number of protons in the nucleus. (a) the ionization energy for the outermost electron in a sodium atom is 5.1 ev. use the bohr model with z = zeffective to calculate a value for zeffective. (b) using z = 11, determine the corresponding value for the radius r of the outermost bohr orbit. (c) using the value calculated for zeffective in part (a), determine the corresponding radius r of the outermost bohr orbit.

your answer is c) plasma

~*"auba14"*~

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o