Modern Atomic theory and orbitals

Electron cloud is based on

• Quantum Mechanics
• Gold Foil Experiment
• Matter is made up of small particles called atoms
• Nuclear Theory

He developed the planetary model of the atom.

• Rutherford
• Bohr
• Chadwick
• Dalton

The energy of each Bohr orbit increases with increasing value of "n," but levels become more closely spaced as "n" increases.

• True

• False

The higher the principal quantum number, the lower the orbital energy.

• True

• False

The possible values for the principal quantum numbers are: n= 0,1,2,3,4

• True

• False

A principal shell with a value of n=3 would contain s, p, d, and f orbitals.

• True

• False

as the principal energy level increases in an atom's orbitals, the average distance of an electron energy level from the nucleus

• increases

• decreases

• stays the same

• varies

• none of these

The maximum number of electrons allowed in the p sublevel of the third principal level is

• 1

• 2

• 3

• 6

• 8

The maximum number of electrons allowed in the fourth energy level is

• 2

• 4

• 8

• 18

• 32

What is the maximum number of electrons that can be put into each of the following subshells?

a. 3p _____________

b. 6s _____________

c. 5d ______________

d. 7f ______________

Answer explanation

a. 6b. 2c. 10 d. 14