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The periodic table is organized so chemists can easily see...
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
The horizontal rows in the periodic table are arranged according to the number of the atom's energy levels called...
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
The atomic mass of an atom is the total number of ___
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
On the periodic table, an element's atomic number is the number of ___ in its nucleus.
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
Which element is located in group 1 of the periodic table?
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
Based on its location in the periodic table, which of the following is classified as a metal?
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
The order of the elements in the periodic table is based on the ___.
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
Vertical columns in the periodic table, which indicate an element's location within a period, are called...
groups
K
number of protons in the atom of the element
protons and neutrons
protons
the atomic number and mass of each element
periods
sodium
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