Introduction to Chemistry Practice Exam Questions Correctly Answered.
Atom - CORRECT ANSWER Smallest particle of matter
proton - CORRECT ANSWER positive particle in the nucleus.
electron - CORRECT ANSWER negative particle in an atom. Is found in the space surrounding the nucleus of an at...
Introduction to Chemistry Practice Exam
Questions Correctly Answered.
Atom - CORRECT ANSWER Smallest particle of matter
proton - CORRECT ANSWER positive particle in the nucleus.
electron - CORRECT ANSWER negative particle in an atom. Is found in the space surrounding the nucleus of an atom
neutron - CORRECT ANSWER neutral particle in the nucleus
element - CORRECT ANSWER a substance containing only one type of atom. Egs. Hydrogen, Helium, Lithium
compound - CORRECT ANSWER two or more elements chemically bonded. Will usually result in physical ans chemical properties that are very different from the elements from which they were formed
ion - CORRECT ANSWER a charged atom or compound
ionic bond - CORRECT ANSWER bond formed between ions of opposite charge. Where the valance electron is transferred from one atom to another resulting in a charged atom. (usually a metal and a non-metal)
covalent bond - CORRECT ANSWER bond that shares electrons (mostly between two non-metals)
positive charge ion - CORRECT ANSWER atom with fewer electrons than protons
negative charge ion - CORRECT ANSWER atom with more electrons than protons solution - CORRECT ANSWER mixture where one substance dissolves in another
solvent - CORRECT ANSWER does the dissolving
solvent - CORRECT ANSWER substance in a solution that has the greater amount
acid - CORRECT ANSWER high concentration of hydrogen ions (H+) and a low concentration of hydroxide
ions (OH -)Has a pH less than 7.
base - CORRECT ANSWER low concentration of hydrogen ions (H+) and a high concentration of Hydroxide ions (OH-)Has a pH greater than 7
pH - CORRECT ANSWER scale that reads how many hydrogen ions (H+) are in a solution.
neutral - CORRECT ANSWER ph of 7. Example pure water
chemical reaction - CORRECT ANSWER changing substances by breaking and forming bonds
reactants - CORRECT ANSWER substances that react together to produce a new substance. They have their bonds broken
products - CORRECT ANSWER substances formed during a chemical reaction. They have new bonds formed
exothermic reaction - CORRECT ANSWER reaction that releases more heat than it absorbs.
endothermic reaction - CORRECT ANSWER reaction that absorbs more heat than it releases.
atomic number - CORRECT ANSWER the number of protons in the nucleus of an atom
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