___________________ is physical substance, which takes up space and has mass.

Matter has 3 common states or phases, and a less common 4th state or phase called PLASMA. Which of the following is NOT one of the 3 common states or phase of matter?

All matter is made up of very small ______________ and/or combinations of _______________.

Ancient Greek philosophers struggled with the question of matter more than 2,000 years ago. At the time, many thought that all matter is made up of only 4 elements: Earth, Fire, Water, and _________.

One philosopher named ____________________________ (460-370 BC) challenged the popular idea of matter and stated that all matter is made up of small solid objects, he called atomos, that cannot be divided, created, or destroyed.

A(n) ________________ is the smallest piece of an element that still represents that element.

In the late 1700's, English schoolteacher and scientist ______________________, was able to test the atomos theory of ancient Greece, and found some basic evidence to support the atomic theory.

In 1981, the invention of a high powered microscope called a(n) ___________________ enabled scientists to see the exterior of individual atoms for the first time.

The____________________ is the region at the center of an atom that contains most of the mass of the atom.

A proton is a(n) _____________________________ in the nucleus of an atom.

A(n) _________________________is an uncharged particle in the nucleus of an atom.

A(n) _______________________________is a negatively charged particle that occupies space in an atom outside of the nucleus

The ______________ model of an atom shows electrons moving in neat specific orbits around the nucleus. This is not truly accurate, as electrons bounce all over the place.

A(n )_____________________________________________is the region surrounding an atom’s nucleus where one or more electrons are most likely to be found.

Electrons closer to the nucleus have ______________ than electrons farther away from the nucleus.

Which of the following would express the charge of a single electron?

Which of the following would express the charge of a single proton?

Which of the following would express the charge of a single neutron?

____________________ is the relative mass of an electron compared to a proton and/or neutron

A(n) __________________________is a substance made from atoms that all have the same number of protons.

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