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Chemical bonds

QuestionAnswer
compound that releases a hydrogen ion (H+) in water acid
It is below 7 on the pH scale acid
compound that removes a hydrogen ion from water and leave a hydroxyl ion (OH- ) bases
Above 7 on the pH scale bases
is a 7 on the pH scale neutral
basic unit of matter atom
atoms are composed of A nucleus with positive protons and neutral neutrons and then outside the nucleus are negative electrons
what substance is made of one type of atom and cannot be broken into simpler substances by ordinary means element
The number of ______________ identifies the element protons
what is filled so that an element is stable outer energy level
Losing electrons form positive ions
atoms sharing electrons form _____________ bonds covalent
Covalent bonds are _______ then ionic bonds weaker
two or more electrons held together by a covalent bonds molecules
Substances composed of two or more different elements that are bonded together in specific ratios compounds
Formed when atoms in the molecules have unequal pulls on the electrons they share polar molecules
example of polar molecules water
The attraction of a hydrogen atom in a polar molecule to the slight negative end of another polar molecule creates a hydrogen bond
attraction among molecules of a substance cohesion
attraction among molecules of different substances adhesion
When one substance dissolves in another it forms a solution
a substance that dissolves another substance to form a solution. ex: water solvent
substances that dissolves example salt solute
The amount of solute dissolved in a certain amount of solvent is a solution's concentration
the first energy level can hold __________ electrons 2
How many electrons can the third energy level hold? 18
a(n) __________ bond is formed when atoms give or take electrons ionic
which type of bond is stronger ionic
The number of protons in an atom is called the ______________. atomic number
how may electrons can the second energy level hold? 8
when an atom gains an electron ____________ are formed negative ion
Created by: maggie_michele
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