Exploring the Periodic Table for Kids

What is an element?

• A compound of various molecules

• A mixture of different substances

• A substance made of only one type of atom

• A substance made of multiple types of atoms

How are elements arranged in the periodic table?

• By their state of matter

• By their atomic mass

• By their atomic number and chemical properties

• Alphabetically

Which group contains the alkali metals?

• Group 18

• Group 17

• Group 2

• Group 1

What is a characteristic of alkali metals?

• They are non-reactive

• They are gases at room temperature

• They are soft and silvery metals

• They are found in their natural state

Which group contains the halogens?

• Group 17

• Group 2

• Group 1

• Group 18

What is a property of nonmetals?

• They are malleable

• They conduct heat and electricity

• They are always solid

• They are not ductile

What divides metals and nonmetals in the periodic table?

• A straight line

• A zigzag line called the metalloids

• A dotted line

• A color-coded line

Which elements are considered metalloids?

• Boron, arsenic, germanium, and silicon

• Helium, neon, and argon

• Sodium, potassium, and lithium

• Chlorine, bromine, and fluorine

How are periods arranged in the periodic table?

• By their atomic number

• By their atomic mass

• By their weight and number of shells

• Alphabetically

Which elements have only one shell?

• Selenium and potassium

• Chlorine and fluorine

• Helium and hydrogen

• Boron and silicon