periodicity: definitions

Question 1

first ionisation energy

Answer 1

the energy required to remove one mole of electrons from one mole of gaseous atoms

Question 2

[] ionisation energy

Answer 2

the energy required to remove one mole of electrons from one mole of gaseous ⁿ⁺ ions

Question 3

periods (ptote)

Answer 3

horizontal rows of elements with similar chemical and physical properties

Question 4

groups (ptote)

Answer 4

vertical columns of elements with similar chemical and physical properties

Question 5

metalloids

Answer 5

elements on and around the metal/nonmetal dividing line

Question 6

blocks (of the periodic table)

Answer 6

correspond to the shell where the outermost (highest energy) electron is found