Answer: It is the number in the upper left (atomic number).
Explanation: The atomic number is normally the number of protons. I hope this helps.
Answer: 0.03798 kilograms
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 
of particles.
To calculate the moles, we use the equation:
1 mole of chlorine gas 
weighs = 71 g
Thus 0.535 moles of chlorine gas will weigh = 
(1kg=1000g)
Thus there are 0.03798 kilograms in 12 L of chlorine gas.
A group is a vertical line on the periodic table
Answer:
1. The plastic is poor conductor of electricity
Explanation:
Indeed when two objects are placed in a room, there'll be flow of energy between the objects and the air in the room until all of them are at the same temperature. So when a person touches a metal that has been sitting in a room and it feels colder than a plastic bag at the same temperature because the moment he touches the metal, which is a good conductor of heat, it immediately starts conducting heat away from his hand leaving his hand with the sensation of "coldness". However when you touch a plastic, a poor conductor, it does not feel as cold because it is conducting very little heat from the hand.
