Metals
Periodic Table
Elements
Elements and Compounds
Common Elements
100
Some metals are not pure elements. They are actually ________, made up of mixtures of metals or metals and other elements. (C-45)
alloys
100
In the Periodic Table, elements are arragned in order of ________ _____________. (C-49)
atomic number
100
An ___________ is a substance made up of only one kind of atom. (C-42)
element
100
A ________ is a substance made of the atoms of two or more elements. (C-50)
compound
100
With an atomic number of 8, this colorless gas makes up about 20% of Earth's atmosphere. (C-43)
Oxygen
200
Bronze is an alloy made up of _________ and _________. (C-45)
copper and tin
200
Every element on the Periodic Table has an abbreviation called ___________ ______________. (C-49)
Chemical Symbol
200
An ___________ is the smallest unit of an element that has all the properties of that element. (C-42)
atom
200
A ____________ ____________ shows which elements and how many atoms of each are in a compound. (C-50)
chemical formula
200
_____________ is a silver-colored metal solid, it combines easily with oxygen, and it is never pure in nature. (C-43)
Aluminum
300
Steel is an alloy made up of __________ and _________. (C-45)
iron and carbon
300
Some elements have properties of both metals and non-metals. These metals are called ___________. (C-49)
Metalloids
300
Each element has an ________ _____________, which is the number of protons (and neutrons) in one atom of that element. (C-42)
atomic number
300
When atoms join to form a compound, they undergo a __________ ____________. (C-50)
Chemical Change
300
____________ is a greenish-yellow gas with a sharp odor. It is 2.5 times as dense as air and it forms a pale yellow solution in water. (C-43)
Chlorine
400
Brass is an alloy of ________ and _____________. (C-45)
copper and zinc
400
All the elements on the left side of the Periodic Table, except hydrogen, are ________. (C-49)
Metals
400
Two or more atoms linked together form a __________. (C-42)
molecule
400
Compounds can react with eachother. When compounds react, they change and ___________ ______ ___________. (C-50)
form new products
400
This element is found in many useful materials, such as steel, and it is found in blood. It carries oxygen to cells. (C-43)
Iron
500
Name the 5 properties of metals. (C-44)
1. Luster 2. Malleable 3. Ductile 4. Conducts or transfers electricity 5. Conducts heat
500
Elements on the Periodic Table are a part of a group. Elements in the same group often have the same number of ____________ in the outer energy levels of their atoms. (C-49)
Electrons
500
There are more than 100 elements, but only _____ natural elements.
90
500

Water is the one of the most common compounds. Give the element names and tell how many atoms are present. (C-50)

2 Hydrogen atoms and 1 Oxygen atom, a total of 3 atoms

500
____________ is a soft, silver-colored metal. It combines easily with other non-metals to form salts such as table salt. (C-43)
Sodium
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