The red arrows in the figure below point to numbers. These numbers indicate _____.
periods
atomic mass
families
atomic number
The red arrows in the figure below point to numbers. These numbers indicate _____.
families
atomic mass
periods
atomic number
The red arrow in this diagram is pointing to a number that indicates the _____.
atomic number
atomic mass
chemical symbol
family
The red arrow in this diagram is pointing to a number that indicates the _____.
atomic number
atomic mass
period
family
The circled element in the figure below is shown in a different font color than surrounding elements. Why is it a different color?
It is the only metal which is in a liquid state at room temperature.
It is the only metal in a solid state at room temperature.
It is the only liquid non-metal in a liquid state at room temperature.
It is the only non-metal in a solid state at room temperature.
The circled element in the figure below is shown in a different font color than surrounding elements. Why is it a different color?
It is the only metal which is in a liquid state at room temperature.
It is the only metal in a solid state at room temperature.
It is the only liquid non-metal in a liquid state at room temperature.
It is the only non-metal in a solid state at room temperature.
There is a gap in the area circled in the diagram below. Why is that gap there?
The four elements in that area behave mysteriously. This gap indicates a gap in scientific knowledge related to those elements to-date.
There is a gap in atomic masses between these neighboring elements.
The elements that belong in this area are still a scientific mystery.
This is where the two rows at the bottom of the Periodic Table would belong. They are moved to the bottom of the table to save space.
The bold black line pointed out in the diagram below is there for a reason. What is that reason?
This line separates liquids and gases.
This line separates metals and non-metals.
This line separates solids and liquids.
This line separates metals and gases.
The most active metal is _____.
The most active non-metal is _____.
Hydrogen, by its electron arrangement, is part of Group 1. It is set apart on the Periodic Table because _____.
its state is everchanging, and it does not quite fit the attached to the remaining elements
it was put in as an afterthought
it has only one energy level and has unique properties
it is the most important element
The elements circled below are shaded green, while the elements to the left are yellow, and to the right are blue. Why are these elements shaded green in color?
They are metalloid, containing some, but not all of the properties of metals.
The designer of the Periodic Table thought it would make the diagram more interesting.
These elements are precious.
Their properties are known to be unstable.
The red arrow in the diagram below is pointing to the _____.