elements and compounds

When two or more elements combine chemically, they form _________.

• DNA

• atoms

• molecules

• compounds

Which of the following is NOT an example of element?

• Helium gas

• Hydrogen

• Ice

• Iron

This picture represents which of the following?

• element

• compound

Has properties of both metals and nonmetals. Good semiconductors for computers.

• metal

• nonmetal

• metalloid

This picture represents which of the following?

• element

• compound

"Na" is the element's

• Chemical Formula

• Compound

• Name

• Chemical Symbol

What is the dense center of an atom?

• proton

• neutron

• electron

• nucleus

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds

The atom is the smallest part of...

• An element

• A mixture

• A compound

Sulfur is considered:

• malleable

• brittle

• ductile

• a good conductor