If you're referring to "The" emergency room rather than "An" emergency room, you can consider it a proper noun and capitalize it. In general it is not capitalized.
No, not unless you use ER which is short for emergency room.
No, because it isnot a propernoun.
No, you do not capitalize "first birthday" in a sentence.
You only capitalize 'deceased' if it is at the start of a sentence.
You should not capitalize a sentence fragment following a colon.
No, not unless you use ER which is short for emergency room.
Ummm.... No it depends on how you use it in a sentence.
No, because it isnot a propernoun.
You do not capitalize chickenpox in a sentence. The exception is if the word is the first in the sentence.
The emergency room is in the annex of the main building
No, you do not capitalize "first birthday" in a sentence.
You only capitalize 'deceased' if it is at the start of a sentence.
Yes. When referring to a specific location (rather than simply the term), you may capitalize the term, e.g. "When admitted to Washington Hospital, he was moved to Intensive Care." The same applies to Emergency Room as a department. "We rushed him to the emergency room." "Charity Hospital has recently remodeled the Emergency Room."
Yes, you should capitalize the letter after a comma in a sentence.
Yes, you should capitalize the word after a comma in a sentence.
Yes, you should capitalize "room" when referring to a specific room before the room number. For example: Room 101.
Yes, you always capitalize a day of the week.