IONIC & COVALENT BONDS
What type of bond forms from attraction between positive and negative ions?
ionic bond
What occurs when bonds break and new bonds form?
chemical reaction
What is the shorter way of showing a reaction using symbols?
chemical equation
When vinegar and baking soda react and feel cold, what type is it?
endothermic
What type of ion forms when an atom loses an electron?
positive ion
What type of bond forms when atoms share electrons?
covalent bond
What is the only sure evidence a chemical reaction occurred?
formation of new substances
What are substances on the left side of an equation called?
reactants
When a log burns and gives off heat, what type is it?
Exothermic
What type of ion forms when an atom gains an electron?
negative ion
What are electrons involved in bonding called?
valence electrons
What principle states matter is not created or destroyed?
conservation of mass
What tells how many atoms or molecules are involved in a reaction?
coefficient
In an endothermic reaction, is product energy higher or lower than reactants?
higher
What charge do Group 1 elements typically have?
1+
What do we call a covalent bond where electrons are shared unequally?
polar bond
What type of reaction absorbs heat energy?
endothermic reaction
What does CaCO₃ represent?
chemical formula
In an exothermic reaction, is product energy higher or lower than reactants?
Lower
What type of bonds form between two nonmetals?
covalent bonds
What are ions made of more than one atom called?
polyatomic ions
What type of reaction releases heat and light (like burning wood)?
exothermic reaction
In MgBr₂, what does the “2” represent?
two bromide ions
What must happen to electrons for a covalent bond to form?
electrons are shared
What is the difference between synthesis and decomposition?
Synthesis makes complex substances; decomposition breaks them down