G8 PhySci POST TEST #1 Nature of Matter

Which type of matter is always made up of only one kind of atom?

• Molecule

• Mixture

• Compound

• Element

The photograph shows the most abundant substance on Earth's surface. Which fact about this substance tells you that it is a compound?

• It can be separated into two substances by a chemical process.

• It is a colorless liquid that is inflammable.

• It appears to be the same type of matter throughout.

• It is made up of atoms that have mass and take up space.

Based on their chemical formulas, which of these common substances is an element?

• Silver (Ag)

• Quartz (SiO₂)

• Marble (CaCO₃)

• Bleach (NaClO)

Who first proposed this model?

• Thomson

• Dalton

• Bohr

• Rutherford

Which two particles are always found in equal numbers in neutral atoms?

• Protons and electrons

• Protons and neutrons

• Neutrons and ions

• Electrons and neutrons

Based on the diagram, which of these is most likely the chemical formula for graphite?

• C

• CO₂

• C₆H₁₂O₆

• 6C

The box shows the element helium as it appears in the periodic table. Which list gives the correct numbers of subatomic particles for a neutral atom of helium?

• Two protons, four neutrons, six electrons

• Two protons, two neutrons, four electrons

• Two protons, two neutrons, two electrons

• Four protons, four neutrons, four electrons

Which two types of information are found in an element's box in the periodic table?

• Atomic structure

• Chemical formula

• Atomic number

• Chemical symbol

Which other element is most likely to be a nonreactive gas?

• Na, number 11

• Cs, number 55

• F, number 9

• Xe, number 54

In this periodic table, which color or colors represent the elements that are metals?

• A. Orange and green

• B. Blue only

• C. Orange only

• D. Blue and green