Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

B. Air is a good insulator of heat.

Explanation:

The right index finger felt warmer than left index finger because air is good insulator of heat. This is because for heat transfer via conduction, the molecules vibrate and collide with neighboring molecules and transfer energy. Since, the air molecules are very loosely packed, conduction of heat is very slow and difficult.

As we know, heat transfers from hotter body to colder body, the heat transferred from left index finger through solid balloon piece to ice water. But, in right index finger had air filled balloon which is not a good conductor of heat and hence, the finger was warmer.

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

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.