Bonding Flashcards
Is energy is released or absorbed as chemical bonds form?
released (exothermic) BARF
What happens, in terms of terms of energy, as chemical bonds are broken?
energy is absorbed (endothermic) BARF
What happens to electrons in an ionic bond?
electrons are transferred
What type of bond forms between metals and nonmetals?
an ionic bond
What type of bond has uneven sharing of electrons?
a polar covalent bond
What elements are in a polar covalent bond?
different nonmetals
What type of bond forms between the same nonmetal?
a nonpolar covalent bond
What happens to electrons in a nonpolar covalent bond?
Electrons are shared evenly
What is the hardness (hard/soft) and melting point (high/low) of a network covalent substance?
very hard and high melting point
What is the relationship between electronegativity and bond polarity?
The greater the DIFFERENCE in electronegativity, the more polar (charged) the bond
What type of bond(s) are in a compound with a polyatomic ion, such as CaSO4?
Both ionic and covalent
Describe the electrons in a metallic bond.
They are a “sea of mobile electrons.”
Are metals good or poor conductors of heat and electricity?
Metals are good conductors of heat and electricity
Are metals malleable or brittle? Shiny or dull
Metals are malleable and shiny.
Do metals have high or low melting points?
High melting point (most of them are solid)
