Hr Bio Ch. 2 #2

Which of the following has two valence electron shells?

What is the unequal sharing of one atom more electronegative?

What consists of two or more atoms held together by covalent bonds?

What decays spontaneously, giving off particles and energy?

What is an atom's attraction for the electrons in a covalent bond?

What formula is a notation which represents both atoms bonding?

What element does NOT make up living matter?

What are attractions between molecules that are close together as a result of these charges?

What shell has the lowest energy level?

What forms when a electronegative atom is also attracted to another electronegative atom?

What is matter made of?

What is an important chemical reaction?

What are two biological themes?

What is the sharing of a pair of valence electrons by two atoms?

What word is the study of life?

What subatomic particle is electrically positive?

What is the equal sharing of electrons?

What is the smallest unit of matter that stills retains the properties of an element?

What is the making and breaking of chemical bonds?

Sodium + Chlorine = _______?

What is a positively charged ion?

Reactants --> _________?

What is the formula when a molecule consists of two atoms of hydrogen?

What subatomic particle is not charged?

What subatomic particle is electrically negative?

What shell is the highest energy level?

What is reached when the forward and reverse reaction rates are equal?

What is a negatively charged ion?

What is NOT part of Biology Hierarchy?