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Most of the mass of an atom is determined by the number of ________.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
On the periodic table, an element's atomic number is the number of ______________ in its nucleus.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
Which of the following best describes electrons in the quantum mechanical model of the atom?
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
Elements are most similar with other elements that are ____.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
Based on its location in the periodic table, which of the following is classified as a metal?
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
All atoms of the same element share the same number of _____.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
Electrons are in a defined region of space close to the nucleus called ____.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
True or False: Most of an atom is filled with empty space.
protons and neutrons
sodium
protons
electron cloud
True
electrons travel in waves around the nucleus.
in the same group
protons
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