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Periodic Table of Elements
CBS SCIENCE EXAM CH. 3
Terms in this set (26)
the nucleus of an atom is made of
the atomic number of an atom is the number of
if the number of neutrons varies in an atom of the same element this creates what?
which of hte following shows the correct, increasing list of elements as they are made through fusion ins tars
hydrogen, helium, beryllium, carbon, oxygen
the particle wihta negative charge is the
the elements in a column (up and down) on the periodic table are called
in stars more massive than the sun, fusion continues until the core is almost all
the number of valence electrons can never be any more than
what is true about atoms
1. always have the same number of protons,
2. can have different number of neutrons
3. the mass of the atoms of a particular element can vary.
the fundamental particles that make up protons and neutrons are called
the mass of an electron is
an atom is neutral if
the number of protons equals the number of electrons
each horizontal row across the periodic table is called a what?
the average mass of all isotopes of an element is called its
each square of the periodic table usually includes what?
the period table DOES NOT include what?
Electron dot diagrams are also called what
the elements in each period are not alike in what?
all matter on earth is what
if the atomic number of atom is changed what is formed?
a new element
the mass of a nutron is what
what happens within an electron cloud
electrons are locked into certain energy levels
valence electrons may be transferred or shared between what
Does protons have a negative charge?
No they have a positive charge
Are most stars made of oxygen isotopes?
are most of the mass of the atom located in the electron cloud?
This set is often in folders with...
CBS SCIENCE EXAM CH 2
CBS SCIENCE EXAM CH. 4
CBS SCIENCE EXAM CH 5
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