Textbook Question
How do atoms of different elements differ?
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How do atoms of different elements differ?
Find the mass in atomic mass units of the following:
a. 1 O atom, with a mass of 2.66 × 10-23 g
b. 1 Br atom, with a mass of 1.31 × 10-22 g
How many O atoms of mass 15.99 amu are in 15.99 g of oxygen?
Why does the fourth period in the periodic table contain 18 elements?
Answer the following questions for the elements from cerium through lutetium:
a. Are they metals or nonmetals?
b. To what general class of elements do they belong?
c. What subshell is being filled by electrons in these elements?
What is the total number of orbitals in the third shell? The fourth shell?