chemistry 9 chapter 1 2nd quiz

Which one of the followings has high energy level?

• K

• L

• M

• Q

Various elements have different numbers of electrons, these electrons are configuration around the nucleus in the atom, this order is called the.............

• Energy level

• Electron configuration

• Orbitals

• Hund’s rule

This principle shows that secondary energy levels are filled with electrons according to their energy level from the lowest to the highest they follow this order.

Orbital 1s is filled first with electrons then 2s then 2p then 3s then 3p then 4s then 3d and so far;

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f ……

• Hund’s rules

• Electron configuration

• Aufbau principle

• Electron

Write the electron configuration for the following element.

Be

• 1s1

• 1s2

• 1s2 2s1

• 1s2 2s2

Write the electron configuration for the following element.

Ne

• 1s2 2s2 2p4

• 1s2 2s2 2p5

• 1s2 2s2 2p6

• 1s2 2s2 2p6 3s2

Write the electron configuration for the following element.

Mg

• 1s2 2s2 2p6 3s2 3p2

• 1s2 2s2 2p6 3s2 3p1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3s1

Write the electron configuration for the following element.

Al

• 1s2 2s2 2p6 3s2 3p1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6

Write the electron configuration for the following subshells?

P3

• 
• 
• 
• 

This rule shows that no two electrons are doubly occupied sub shell (secondary level) unless its orbitals are singly filled.

• Aufbau principle

• Hund’s rule

• Electron configuration

• Energy levels

Write the electron configuration for the following element.

Ar18

• 1s2 2s2 2p6

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3s2 3p4

• 1s2 2s2 2p6 3s2 3p6