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Periodic Table

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Across
3
Electrons located in the outer-most orbital of an atom
4
This small group of elements contains carbon, and is found predominantly in living things.
5
A group of elements whose neutral atoms contain a full valence orbital and are therefore non-reactive chemically.
7
The mass of a particular isotope of an element.
12
The energy required for a neutral atom to become an ion
13
The "father" of the modern periodic table
14
The name of the family of metals located in group 2 of the periodic table.
16
The quantity of an isotope found in nature, expressed as a percentage of the total atoms of that element found in nature.
17
Two or more atoms having the same number of protons and electrons (thus being the same element), but having a different mass as a result of having different numbers of neutrons
18
A group of elements each containing seven valence electrons.
Down
1
The width of an atom, from the center of the nucleus to the outermost orbital.
2
Elements arranged in order from left to right.
6
A group of unstable, radioactive metallic elements that include the element Lanthanum.
7
A family of elements that have both metallic and non-metallic properties.
8
The ability of an atom to maintain its structure; depends upon the ratio of protons and neutrons
9
A large group of metals located in the middle of the periodic table.
10
A highly radioactive, unstable group of elements with large atomic masses and low nuclear stability.
11
This family of elements is found to the right of the black staircase, located on your periodic table.
14
A group of metals containing one valence electron.
15
These diagrams contain an element symbol surrounded by a number of dots equivalent to the number of valence electrons in the atom