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QuestionAnswer
the 3 particles that make up an atom are protons, neutrons, and electrons
the space surrounding the nucleus of an atom contains electrons
if an atom contains11 protons and 12 neutrons, its atomic # is 11
a covalent bond is formed as the result of sharing an electron pair
when hydrogen and oxygen combine and form water, water is a product
solutions that contain conccentrations of H* ions lower than pure water are bases
if the pH of stomach acid and of oven cleaner (a base) were measured, the pH of stomach acid would be below 7, but the pH of oven cleaner would be above 7
a mao of eastern North America, showing the pH of rainfall in the various states, indicates that the pH of rain in New York State varies from 4.22 to 4.40. According to these figures, the most acidic rainfall in New York State has a pH of 4.22
A substance w/ a pH of 6 is called an acid
a solution is a uniform mixture of 2 or more substances
when salt is dissolved in water, water is the solvent
which of the following is not an element? water
which of the following particles are found in the nucleus of an atom protons and neutrons
compared to nitrogen -14, the radoiactive isotope nitrogen -16 has 2 more neutrons
a covalent bond forms when 2 atoms share a pair of electrons
substances formed by a chemical reaction are called products
a solution w/ a pH of 9 is basic
the most common elements in most living things are oxygen, carbon, hydrogen, and nitrogen
which of the following terms describes a substance formed by the chemical combanation of 2 or more elements in a fixed ratio? compound
the nucleus is made up of protons and neutrons
isotopes are atoms of the same element w/ the same # of protons and a different # of neutrons
what type of ion forms when an atom loses electrons? positive
in chemical reactions, atoms are rearranged
identify the reactant(s) in the chemical reaction, CO2+H20--H2CO3 CO2 and H20
which of the following makes up a molecule of water? 2 atoms of hydrogen and 1 atom of oxygen
Created by: izzit23
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