DO NOT REPLY IF YOU DO NOT KNOW THE ANSWER, AND NOT WITH USELESS ITEMS FOR POINTS. I am reposting this as someone decided to reply with song lyrics.

To draw a Lewis structure for a covalent compound, begin by calculating A, the available electors, and N, the needed electrons.

What is N for silicon tetrachloride, SiCl4?

This is a type in answer and not multiple choice!

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance