Atoms and the Periodic Table

The modern periodic table organizes elements by _________________.

• atomic mass

• density

• state of matter

• atomic number

Which of these is NOT found on an element key?

• atomic number

• atomic mass

• density of element

• atomic symbol

Rows on the periodic table are called _______________.

• periods

• groups

• rows

• columns

Columns on the periodic table are called _____________.

• periods

• groups

• rows

• columns

Which group of elements is highlighted here?

• metals

• nonmetals

• metalloids

Which group of elements has properties of both metals and nonmetals?

• halogens

• transition elements

• metalloids

• none of these are correct

Which group of elements is illustrated here?

• alkali metals

• alkali earth metals

• transition elements

• noble gases

One property that all metals share is _____________________.

• react with air and water

• contain iron

• melt at high temperatures

• good conductors of heat and electricity

At room temperatures, most metals are __________________.

• solid

• liquid

• gas

• plasma

One characteristic of all noble gases is that ________________.

• they are highly reactive

• they do not exist as single elements

• they do not form compounds

• they are all poisonous