Bonding Unit Flashcards
What does the period of an element indicate?
number of energy levels its atom has
A Chemical bond is __________
an electrostatic force of attraction (attraction of positive and negative charges
What are valence electrons?
electrons in the outermost energy level of an atom
What makes an atom unstable?
unpaired valence electrons
What is an orbital? How many electrons are in one orbital?
A region where an electron is likely to be found in an energy level. 2 electrons are in one orbital.
Number of electrons in the first three energy level
2-8-8
Which atomic particles take part in chemical reactions?
unpaired valence electrons
Atoms form bonds to try to mimic_______
the arrangement of noble gases
What does electronegativity measure?
the force of attraction between an atom’s nucleus and its own and other atom’s electrons
As you go right and high on the periodic table the electrons are held more ____ therefore the reactivity ____
tightly; decreases
Noble gases have ______ electronegativity and hold their electrons _____
no; the most tightly
