Matter

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

• H₃PO₄

• H₂SO₄

• HCIO₃

• H₂O

The diagram shows you a Helium symbol in periodic table. What is electron number of Helium?

• 6

• 4

• 2

Subatomic particle with negative charge is

• Proton

• Electron

• Neutron

Non-charged subatomic particle is

• Proton

• Electron

• Neutron

Neutrons + Protons = _________

• Atomic Number

• Atomic Mass

• Electrons

• Element

A pure substance that cannot be broken down into any other substance by chemical or physical means. There are about 100 of us shown in the Periodic Table

• compound
• mixture
• molecule
• element

Type of matter made of two or more elements...

• element
• mixture
• compound

What term refers to "two or more substances combined physically, but are still able to be separated?"

• Mixture

• Solution

• Matter

• Combination

Which describes a property of all elements?

• All elements are metals.

• All elements have six electrons.

• All elements exist in the solid phase.

• All elements are pure substances.

Max is hungry and he prepares cereal with milk. This is an example of a: 

• Homogeneous mixture
• Heterogeneous mixture