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Atoms- Chapter 4 & 5 Final

Across
A negatively charged electrode.
Atoms are electrically _____.
Each horizontal row of the periodic table is called a _____.
The electrons orbiting the nucleus make up most of the _____ of the atom.
_____ believed that atoms were indivisible and indestructible.
The number of protons and neutrons in the nucleus give the _____ number.
Subatomic particles with a negative charge.
Subatomic particles with a neutral charge.
The number of protons in the nucleus of an atom gives the _____ _____.
Elements are different because they contain a _____ number of protons.
The number of protons equals the number of electrons in the atom of an _____.
Protons have a ____ of about 1840 times that of an electron!
Protons and neutrons are found in the _____ of an atom.
Each perpendicular column of the periodic table is called a _____.
The atomic number identifies the _____.
J.J. ____ discovered electrons.
Neutrons were discovered by James _____.
Electrons are found in _____ around the nucleus.
Down
The periodic table allows you to _____ properties of different groups of elements.
A positively charged electrode.
The mass of a _____ is approximately equal to the mass of a proton.
Isotopes of an element have different _____ _____.
The periodic table is organized by repeating _____.
_____ of an element have the same number of protons but different numbers of neutrons.
_____ Atomic Theory has four main components to explain atoms.
Subatomic particles with a positive charge.
The smallest particle of an element that retains its identity in a chemical reaction.
The _____ pudding model of an atom was incorrect.
The nucleus was discovered using the _____-___ experiment.
Goldstein discovered the _____ using the cathode-ray experiment.