The Structure of Matter

Which of these is the smallest particle to retain the properties of an element?

• an atom

• a proton

• a molecule

• an electron

What makes physical properties different from chemical properties

• physical properites relate to elements and chemical relate to compounds

• Physical properties appear only after chemical changes occur.

• Physical properties describe elements in a solid state rather than liquid or gas

• physical properties can be observed without without changing the substance.

A water molecule is made of two hydrogen and one oxygen atoms. Why is it considered a pure substance?

• each water molecule is identical

• water can be broken down by physical means

• water molecules are made of different types of atoms.

• water can be combined with other substances by physical means.

Tags

NGSS.MS-PS1-1

Each element has a unique name. How else can an element be represented?

• by its mass

• by its state of matter

• by its chemical symbol

• by its identification number

which of these substances is likely to be formed of particles with repeating crystalline structure?

• salt

• glass

• honey

• nitrogen

Which of these is the chemical property of an object?

• the object is opaque

• The object will rust

• the object reacts with acid to form water

• The object has a density of 2.11g/cm

Tags

NGSS.MS-PS1-5

Feldspar has a mass of 25 and a volume of 5. What is its density?

• 5

• .50

• 50

• .55

galena has a mass of 9 and a volume of 1.2. What is the density?

• .75

• 7.5

• 75

• .755

Which statement describes a chemical property?

• a particular substance evaporates at 30*C

• A 2ft. metal bar has a mass of only 176 Kg.

• A certain heavy object turns to liquid at room temperature

• a metal is added to a beaker of water and the metal rusts.

Tags

NGSS.MS-PS1-2

All of these statements about elements, atoms, and compounds are true except _____.

• .             compounds are smaller than atoms

•               atoms cannot be broken down into smaller substances

• elements and compounds form the basis of all materials on Earth

• elements consist of one type of atom and can combine to form compounds

Tags

NGSS.MS-PS1-1