Science Test

What are valence electrons?

• Valence electrons are the electrons that determine the mass of an atom.
• Valence electrons are the protons in the nucleus of an atom.
• Valence electrons are the electrons in the outermost shell of an atom that participate in chemical bonding.
• Valence electrons are the electrons that are lost during radioactive decay.

Be able to determine the number of valence electrons when looking at the periodic table. What tells you that?

• The period number of the element.
• The group number of the element in the periodic table.
• The atomic mass of the element.
• The color of the element in the periodic table.

How many valence electrons are in Ba

• 4 valence electrons because it is in group 4

• 2 valence electrons because it is in group 2

• 3 valence electrons because it is in group 3

• 1 valence electrons because it is in group 1

How many valence electrons are in Sulfur (S)?

• 16 valence electrons because it is in group 16

• 8 valence electrons because it is in group 16

• 2 valence electrons because it is in group 16

• 6 valence electrons because it is in group 16

How many valence electrons are in Phosphorous (P)?

• 2 valence electrons because it is in group 15

• 5 valence electrons because it is in group 15

• 15 valence electrons because it is in group 15

• 3 valence electrons because it is in group 16

How many valence electrons are in Potassium (K)?

• 1 valence electrons because it is in group 1

• 4 valence electrons because it is in group 2

• 3 valence electrons because it is in group 1

• 2 valence electrons because it is in group 12

How many valence electrons are in Argon (Ar)?

• 2 valence electrons because it is in group 18

• 8 valence electrons because it is in group 18

• 2 valence electrons because it is in group 2

• 8 valence electrons because it is in group 8

What are characteristics of metals?

• Metals are conductive, malleable, ductile, lustrous, and usually solid at room temperature.
• Metals are dull and not malleable.
• Metals are brittle and non-conductive.
• Metals are usually gas at room temperature.

What are characteristics of nonmetals?

• Nonmetals are generally poor conductors, have high electronegativities, can be solid, liquid, or gas, and tend to gain electrons.
• Nonmetals tend to lose electrons easily.
• Nonmetals are conductive, malleable, ductile, lustrous, and usually solid at room temperature.

• Nonmetals are excellent conductors of electricity.

What are the characteristics of metalloids?

• Metalloids have no luster and are always gaseous at room temperature.
• Metalloids are generally poor conductors, have high electronegativities, can be solid, liquid, or gas, and tend to gain electrons.

• Metalloids are conductive, malleable, ductile, lustrous, and usually solid at room temperature.

• Metalloids are semiconductors, brittle, have metallic luster, and exhibit properties between metals and nonmetals.