vocab+facts
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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atom | the smallest particle of an element that still has the same chemical properties of the element
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nucleus | at the center of an atom and contains most of its mass
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neutrons | have no electrical charge
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protons | have a positive electrical charge
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atomic number | the number of protons in an atom element
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electrons | have a very small mass and a negative electrical charge
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periodic table | a chart that shows the elements in order of increasing atomic number
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motecule | the smallest particle of a compound that still has all the qualities of that compound
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isotopes | atoms of the same element that have different atomic massses
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Na+CI = ? | NaCI
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chemical formula | a simple way to indicate the composition of elements in a compound
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metals | conduct heat and electricity. it melts at high temperatures and can be reshaped
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nonmetals | have a dull surface and melt at lower temperatures, and tend to break when bent
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metalloids | have some properties of metals and some of nonmetals
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atomic mass | the number of protons added to the number of neutron
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which of the following has the LEAST atomic mass? A) oxygen)O) B)carbon(C) C)nitrogen(N) D)helium(He) | B: Carbon(C)
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the lead in a pencil is composed of the element_________ | carbon
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water is composed of the elements _________ and _________ | hydrogen; oxygen
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compound | a substance formed from the chemical combination of 2 or more elements that then act as a unique substance
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water is a ______ | compound
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scientists have discovered more than ____ elements | 100
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a diamond is made of what? | carbon
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isotopes | atoms of the same element may have different numbers of neutrons
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iron | an atom that has an overoll positive or negative charge
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chemical formula | a simple way to indicate the composition of elements in a compound
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Created by:
moncheechee19
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