Squeezing of a balloon is a one way to burst it..why?

When you squeeze a balloon you re putting all of the air to the top or the bottom of the balloon so at some point it will overflow of so much air that it will pop. It is kind of like when we hold our breath for to long, instead of popping, we pass out. Because we need air and so does the balloon. If the balloon was meant to be squeezed, it would've been all mushy so you can squeeze it and it would be like goo. So if you don't wanna pop your balloon, then don't squeeze it.

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.

Noble gases is far right