1- why is it difficult to measure the size of an atom? 2-what does the term atomic radius mean?

3-what is Ionization mean?

4- what exception exist in this trend?

5a-What trend evident in atomic radius as you proceed down a group of element?

5b-how does this trend progress as you move across a period?

6- define the term electron shielding?

7a- what effect does electrons shielding have on atomic radius? On ionization energy?

8- when an atom loses an electron, what is it's charge? What do you think happens to the atomic radius of the atom?

9- when an atom gains an electron, what is it's charge? What do you think happens to it's atomic radius?

10- what metal in period 6 has lowest melting point? The lowest boiling point?

Please ASAP

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

idk what is it? is this a question that you know the answer or u dont