ESL5 (2-1) Science : Elements

Which one is an element?

• water

• fire

• hydrogen

• cube

a material that cannot be broken down into anything simpler by chemical reactions

• chemical reactive

• element

• metal

• metalloids

Water can be broken down into....

• hydrogen

• sodium

• gold

• oxygen

Scientist know of just over......elements.

• 112

• 118

• 59

• 467

What are the important properties of elements?

• whether they are metals, nonmetals, and metalloids

• the way they combine with each other elements

• State of matter at room temperature

• They are elements that have properties between metals and nonmetals

Which one is nonmetal?

• 
• 
• 
• 

They are elements that share common properties.

• nonmetals

• metals

• metelloids

They are elements that are poor conductors, dull and brittle.

• metal

• nonmetal

• metalloids

They are elements that have properties between metals and nonmetals

• metal

• nonmetal

• metalloids

____________ proposed that elements are made of tiny particles.

• John Dalton

• Dmitri Mendeleev