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chapter 1 review

atoms and matter

QuestionAnswer
what is an atom a small particle that is the building block of matter
what happens when atoms combine they form the different types of matter (by bonding)
what is an element a substance made of only one kind of atom
what is a compound two + elements that are chemically joined
anything that has ______ and takes up space mass
most of _____ elements
two classifications: ____ and ____ compounds, elements
two types of molecules: ____ and ____ substances, elements
what is made of only one type of atom, organized on the periodic table, and have a chemical symbol element
what is made of two or more types of atoms bonded together, properties are different from the elements that make it up, and have chemical formulas compound
what is made of two or more substances that are not bonded together, combinations of substances can vary, and there are two types of them mixture
what has two or more substances unevenly mixed and have different substances visible by unaided eye or microscope heterogeneous mixture
what has two or more substances evenly mixed and have different substances that cannot be seen by a microscope homogeneous mixture
something that has lost or gained electrons ion
ions have a negative____ charge
atoms have a central region called _____ nucleus
atoms have a region surrounding the central area called an ____ electron cloud
an electron cloud contains____ electrons
the nucleus contains particles called ____ and _____ protons and neutrons
an isotope has the same number of these compared with other atoms of the same element proton
an isotope has a different number of these compared with other atoms of the same element neutron
the nucleus of an atom contains _____ and neutrons protons
the nucleus has a _________ and the ________ of an atom positively charged, most mass
an electron is a _____ particle located outside the nucleus negatively charged
the modern model of an atom is called the _____ model electron-cloud
electrons that are close to the nucleus have ______ than electrons that are farther from the nucleus less energy
the atomic number is the number of ______ in the nucleus of an atom of an element protons
isotope have the same number of protons but different numbers of _____ neutrons
an ion has a charge because it has gained or lost _____ electrons
a _______ ion has more protons than electrons positive
adding a ______ to a neutral atom produces a new element proton
Created by: harbahal2693
 

 



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