IS Chapter 15 Review - Periodic Table

When Mendeleev made his arrangement of the elements in a table, he found that elements with ______________ fell into groups on the table.

• the same mass
• similar size
• similar properties

Every element has its own atomic number. The atomic number is the number of ______________ in the nucleus of an atom of the element.

• neutrons
• positrons
• protons

In the modern periodic table, elements are arranged according to increasing __________________.

• atomic number
• atomic mass
• date of discovery

Elements in the ___________ group can be used as catalysts.

• actinide
• carbon
• platinum

What is the name of the elements in Group 2 of the periodic table?

• alkali metals
• boron family
• alkaline earth metals

Which of the following statements about iron is NOT correct? Iron is _________________.

• a component of steel
• a member of the Iron triad
• a metalloid

Elements in Group 3 through 12 of the periodic table are called_________________.

• transistion elements
• representative elements
• halogens

_________________ conducts electricity when exposed to light, so it is used in solar cells and in light meters.

• Bromine
• Boron
• Selenium

A major difference between the two rows of the inner transition elements is that the lanthanides ________________.

• are radioactive and the actinides are not
• occur in nature while most of the actinides are synthetic
• are gases at room temperature and the actinides are solids

The element silver is widely used in dentistry.

• True
• False