Trends in Atomic Radius

How large is the charge that the second energy level of nitrogen "feels" from the nucleus?

• +5

• +3

• +4

• +7

Why does the first energy level in each of the three above diagrams only contain two electrons?

• The first energy level cannot hold more than two electrons

• They could hold more if they want, the illustrator just decided to only put two electrons in the first energy level.

• Because the three elements drawn are all in the 2nd row on the periodic table

Tags

NGSS.HS-PS1-1

How many electrons can fit in the second energy level of any atom?

• 8

• 2

• 18

• 6

How many electrons can fit in the third energy level of any atom?

• 8

• 2

• 18

• 32

How many energy levels does aluminum have?

• 1

• 2

• 3

• 4

• 5

How many electrons should be in each energy level of aluminum?

• 2 electrons in the first energy level

  8 electrons in the second energy level

  3 electrons in third energy level

• 13 electrons in the third energy level

• 10 electrons in the first energy level

  3 electrons in the third energy level

• 2 electrons in the first energy level

  11 electrons in the second energy level

Tags

NGSS.HS-PS1-1

The black dot in the center is the nucleus, with the first ring representing the first energy level, etc.

Draw a Bohr diagram for the aluminum atom.

Draw the electrons as filled in circles.

Tags

NGSS.MS-PS1-1

How large is the charge that the second energy level of an aluminum atom "feels" from the nucleus?

• +11

• +13

• +10

• +8

• +3

Tags

NGSS.HS-PS2-4

How large is the charge that the third energy level of an aluminum atom "feels" from the nucleus?

• +11

• +13

• +10

• +8

• +3

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

Which atom is larger: nitrogen or carbon? Why?

• Carbon, b/c nitrogen's nucleus pulls on the outer electrons harder (+5 attraction) than carbon's nucleus (+4 attraction).

  Therefore nitrogen's electrons are pulled closer to the nucleus making nitrogen smaller.

• Carbon, b/c carbon's nucleus pulls on the outer electrons harder (+5 attraction) than nitrogen's nucleus (+4 attraction).

  Therefore nitrogen's electrons are pulled closer to the nucleus making nitrogen smaller.

• Nitrogen, b/c nitrogen's nucleus pulls on the outer electrons harder (+5 attraction) than carbon's nucleus (+4 attraction).

  Therefore carbon's electrons are pulled closer to the nucleus making carbon smaller.

• Nitrogen, b/c carbon's nucleus pulls on the outer electrons harder (+5 attraction) than nitrogen's nucleus (+4 attraction).

  Therefore carbon's electrons are pulled closer to the nucleus making carbon smaller.

Tags

NGSS.HS-PS1-1