Which of the following statement is correct for a group of a periodic table. i} All elements have different valency.

ii} The atomic size decrease as we move down.

iii} The electropositivity increase down the group.

iv} The electronegativity increase down the group.

I believe it is B

Explanation:

I am on this lesson too :)

III  Electropositivity increases down the group

Explanation:

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?