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