What element has this electron configuration?

$$1s^22s^22p^63s^23p^4$$

(a)  

What is the electron configuration of Carbon? (C)

(a)  

What noble gas should you use to write the electron configuration for iodine? (I)

(a)  

Using noble gas abbreviation, write the electron configuration for calcium. (Ca)

(a)  

Using noble gas abbreviation, write the electron configuration for bromine. (Br)

(a)  

Using noble gas abbreviation, write the electron configuration for barium. (Ba)

(a)  

What element has this electron configuration?

$$\left[Ar\right]\ 4s^2\ 3d^6$$

(a)  

How many valence electrons does nitrogen (N) have?

(a)  

How many valence electrons does aluminum (Al) have?

(a)  

How many valence electrons does the element with this electron configuration have? $$1s^2\ 2s^2\ 2p^1$$

(a)