What is meant by "elastic collisions"?

heat given off by constant collisions,
compression of the gas,
resultant force of all combined collisions, or
collision and rebound without loss of energy

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

If 3.00 g of titanium metal is reacted with 6.00 g of chlorine gas, cl2, to form 7.7 g of titanium (iv) chloride in a combination reaction, what is the percent yield of the product?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?