Patterns In the Periodic Table Flashcards
Atomic/Covalent Radius is?
Half the distance between two nuclei
What is Ionization Energy
It is the energy required to remove one mole of electrons from one mole of atoms in the gaseous state
What is electronegativity
It is the measure of attraction, which an atom has for bonding electrons
On crossing a period in the PT the ATOMIC SIZE does what? and explain
It decreases because on crossing the period the electrons in the outer energy levels are more attracted to or are pulled closer to the nucleus because of its increasing positive charge.
On descending a group in the PT the ATOMIC SIZE does what and explain
It increases because the number of occupied energy levels is increasing and the number of shells increases.
On descending a group in the PT the first IONISATION ENERGY does what and explain?
It decreases because the outermost electron is, on average, farther from the nucleus, meaning it is held less tightly and requires less energy to be removed.
On crossing a period in the PT the first IONISATION ENERGY does what? and explain
It increases because there is an increased nuclear charge which results in the outer electrons being strongly bound to the nucleus
On crossing a period in the PT, the ELECTRONEGATIVITY values does what and explain?
It increases because there is an increased nuclear charge which results in the outer electrons being strongly bound to the nucleus
On descending a group in the PT the ELECTRONEGATIVITY values does what and explain
it decreases because there are more shells so increased screening and the outermost electrons are further away from the nucleus
