1.how does the surface tension of water compare with the surface tensions of most other liquids? (1 point)
it is lower. ***
it is about the same.
it is higher.
it is higher when a surfactant is added.
2. what is the shape of the water molecule? (1 point)
linear
tetrahedral
trigonal planer
bent ***
3.the bonds between adjacent water molecules are called (1 point)
hydrogen bonds
ionic bonds
nonpolar covalent bonds
polar covalent bonds
4. the fact that ice is less dense than water is related to the fact that (1 point)
the molecular structure of ice is much less orderly than that of water
the molecules of ice are held to each other by covalent bonding
ice has a molecular structure in which water molecules are arranged randomly
ice has a molecular structure that is an open framework held together by hydrogen bonds ***

Unit 1 Lesson 10 Water and Its Properties   Just so you guys know, the answer above is 100% correct, I am doing this so if they change up the order of the answers or the questions that you guys know which one is the correct answer.  

1. C It is higher

2. D bent

3. A Hydrogen Bonds

4. D ice has a molecular structure that is an open framework held together by hydrogen bonds.  

100% correct, cheers!  

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.