The Periodic Chart Of Atoms

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Name ______________________________________ Block _________________
The Periodic Chart of Atoms
1. Each square contains the element name and symbol for an atom. This _______________ is
an abbreviation adopted by the International Atomic Weights Committee.
2. The number in each square above the symbol is the _______________ _______________.
The atomic number is the most fundamental fact about the atom.
3. The _______________ _______________ is the net number of positive nuclear units of
electrical charge. These positive units are called protons.
4. The _______________ is a positively charged unit denoted by a plus (+) sign.
5. Each atom must contain an equal number of negative and positive units. A minus (-) sign
denotes a _______________ particle which is called an electron.
6. The nucleus of an atom contains a positive electrically charged unit called a ____________.
7. Oxygen has an atomic number of _______________.
8. The _______________ number of oxygen (O) indicates that one atom of oxygen contains
_______ protons in its nucleus.
9. Oxygen (O) also contains 8 minus charges called _______________.
10. The atomic __________ indicates the number of positive charges called __________
contained in the nucleus.
11. There will also be an equal number of minus charges called _______________ contained in
the shells outside the nucleus.
12. Find Cu, the symbol denoting copper. Copper (Cu) has an ___________ ___________ of
29.
13. The nucleus of copper (Cu) atom contains __________ protons.
14. An atom of copper (Cu) also contains __________ electrons.
15. Find the symbol H denoting Hydrogen. Hydrogen (H) has an atomic number of _________.
16. This means hydrogen (H) has _____ proton(s) and _____ electron(s).
17. The symbol Pb denotes __________. This element has an __________ __________ of 82.
18. This indicates an atom of lead (Pb) contains _____ protons and _____ electrons.

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