Atomic Structure and Periodic Table

What group and period does this element belong in?

• Period 2 and Group 1

• Period 3 and Group 2

• Period 3 and Group 1

• Period 4 and Group 1

What is the periodic law?

• The properties of elements are a periodic function of their atomic numbers.

• The atomic mass of elements increases periodically.

• Elements are arranged in order of increasing density.

• The chemical properties of elements are random and do not follow a pattern.

What are the horizontal rows in the periodic table called?

• Groups

• Families

• Periods

• Blocks

What is the charge of an electron?

• Positive charge.

• Neutral charge.

• Negative charge.

• Variable charge.

What is the charge of a proton?

• Negative charge

• Neutral charge

• Positive charge

• Variable charge

What is the charge of a neutron?

• Positive charge

• Negative charge

• No charge (neutral)

• Variable charge

________________ have a positive charge, ___________________ have NO charge, and _____________________ have a negative charge.

• Protons, Neutrons, Electrons

• Neutrons, Protons, Electrons

• Electrons, Protons, Neutrons

• Protons, Electrons, Neutrons

What is the significance of the atomic mass?

• It is the total number of protons in an atom.

• It is the weighted average mass of an element's isotopes.

• It represents the number of electrons in an atom.

• It indicates the reactivity of an element.

The atoms along the staircase are called?

• Metalloids

• Noble gases

• Alkali metals

• Transition metals

What is a metalloid?

• Elements that have properties of both metals and nonmetals.

• Elements that are always gases at room temperature.

• Elements that are good conductors of electricity.

• Elements that are found only in nature and not synthesized.