1. Section 3 Metals, Metalloids and Nonmetals

2. Metals Shiny Solids (at room temp) Malleable – can be hammered flat
Ductile – can be pulled into wire
High Conductivity – ability to transfer heat or electricity to another object

3. Reactivity of Metals Low High
Metals will usually lose electrons when they react with other elements

4. Nonmetals Sulfur Opposite of properties of metals Not shiny
Poor conductors
Mostly gases (at room temperature)
Solids are brittle
Sulfur

5. Reactivity of Nonmetals
Low
Low
High
Nonmetals will usually gain or share electrons when they react with other elements

6. Some Important Nonmetals
Carbon – important element for making up living organisms
Noble Gases – group 18 – very nonreactive. Have full outer shells.

7. Metalloids Inbetween metals and nonmetals Solids (at room temp)
brittle and hard
Semiconductors – can conduct electricity under some conditions but not others.
very important for computer chips
Most common example – Silicon – in sand and glass

8. Assessment The atomic number is the number of valence electrons.
neutrons.
protons in the nucleus.
electrons in the nucleus.
Protons in nucleus

9. Assessment
The periodic table is a chart of the elements that shows the repeating pattern of their
energies.
properties.
element symbols.
names.
properties

10. Assessment
Which piece of information cannot be found in a square on the periodic table?
Atomic mass.
Chemical symbol.
Atomic number.
Number of neutrons.
Number of neutrons

11. Assessment Which element will have properties most similar to Calcium?
Potassium.
Scandium.
Magnesium.
Bromine.
Magnesium.

12. Assessment
Which group is most likely to lose/share 2 electrons in a chemical reaction? 1. 2.
17.
18.
Magnesium.

13. Assessment
Which side of the periodic table contains most of the nonmetals?
Left side.
Right side.
Middle.
Magnesium.

14. Assessment Which is not a property of nonmetals? Brittle.
Nonmalleable.
High conductivity.
Most are gases at room temperature
Magnesium.

15. Assessment Which metal is probably the most reactive? Potassium
Calcium
Scandium
Titanium
Potassium

16. Assessment Which nonmetal is probably the most reactive? Nitrogen
Oxygen
Fluorine
Neon
Flourine