Saturday, 30 August 2014

THE ATOM


THE ATOM
Select the correct term to complete the sentences
periodic table
atomic number
strong nuclear force
probability
photons
energy level
electron
groups
nucleus
spectral lines
isotopes
uncertainty principle
metal
1. Protons and neutrons are found in the ____, at in the center of the
atom.
2. A(n) ____ is a particle with a negative charge.
3. ____ are atoms of the same element with different numbers of
neutrons.
4. The strongest force in the universe is known as the ____.
5. The number of protons in the nucleus in an atom is the element’s
____.
6. The ____ is a way of organizing the elements based on their chemical
properties.
7. The first ____ of an electron cloud has the lowest energy and is
closest to the nucleus.
8. The vertical columns of the periodic table are called ____.
9. A(n) ____ is a shiny, opaque element that is a good conductor.
10. According to quantum theory, light energy comes in little bundles
called ____.
11. Each element emits a characteristic pattern of ____.
12. Heisenberg’s ____ states that you cannot precisely measure the
location of an electron because it is so tiny.
13. If you toss a single penny, the ____ of getting heads is 50%.