Substances & Mixtures
A substance whose atoms all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number.
What is an Element?
a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends.
What is a periodic table?
particle found in nucleus of an atom with a positive charge, # determines the atomic number of the element
What is a proton?
a substance consisting of two or more different elements chemically combined
What is a compound?
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What is how many elements there are on the periodic table?
particle found in nucleus of an atom with no charge, # combined with # of protons to determine an element’s atomic mass
What is a neutron?
Any combination that does not have uniform composition and properties by physical means.
What is heterogeneous?
What is sodium?
the number of protons in a specific element and it is the number one way the periodic table is arranged.
What is the atomic atomic number?
Any combination that does not have uniform composition and properties by physical means.
What is a mixture?
This element has the largest atomic mass on the periodic table.
What is uranium?
the total amount of mass of one atom of an element. The mass of a nucleus (protons plus neutrons).
What is the atomic mass?
Any combination of substances that has uniform composition and properties by physical means.
What is homogeneous?
This element has the has the lowest boiling point.
What is helium?
a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
What is a electron