Fall Final Review

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Across
2.	In beta decay, the atomic number ___ by one but the mass number remains the same.
4.	Protons and neutrons are found in the ___ of the atom.
8.	One substance completely dissolved in another.
11.	Total number of protons in an atom.
12.	Na2SO4 represents a chemical _____.
13.	Name of the family of unreactive elements.
14.	Carbon-12 and Carbon-14 are examples of ?
16.	A bond between two element from the same family would most likely be this type.
17.	A mixture of two or more metals.
18.	First subatomic particle discovered.
20.	A horizontal row of elements on the PT.
22.	The most difficult radiation to block is ___?
25.	The splitting of a nucleus.
26.	____ spaces were left in Mendeleev's PT for undiscovered elements.
28.	A change that does not affect the identity of a substance.
29.	Atom that has gained or lost electrons and has a charge.
30.	During nuclear fission, the subatomic particle that is released is a(n) __?
31.	A vertical column of elements.
32.	More than 80% of the elements are of what type?
33.	At room temperature, most elements are in what state?

Down
1.	Groups 3-12 on the periodic table are known as the ___ elements.
3.	Matter that cannot be seen even with a microscope is said to be?
5.	States that the properties of the elements repeat by a pattern if arranged in increasing atomic number order.
6.	Has properties of both metals and nonmetals.
7.	The time required for 1/2 of a radioactive sample to decay.
9.	A covalent bond tends to form between two ___ elements.
10.	Reactions between two atoms involve ____ electrons.
15.	Eight valence electrons.
19.	Compared to a proton the charge of an electron is equal but ___?
21.	A Lewis Structure represent valence electrons as ___ placed around a chemical symbol.
23.	Two oppositely charged particles form an ___ bond.
24.	The joining of two smaller H nuclei to form a He nucleus.
27.	Two protons and two neutrons make up a(n) __?

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