Stogs Y9 Elements, compounds and mixtures

Elements, compounds and mixtures

Fill in the Blank

An element is a substance that

cannot be broken down

into anything _______

Fill in the Blank

A mixture is a substance consisting of

two or more substances mixed together,

not in fixed proportions

and not __________ bonded together

Fill in the Blank

A compound is a substance consisting of

two or more elements __________ combined.

Multiple Choice

What is the chemical symbol for the element Iron?

• I

• Ir

• F

• Fe

Multiple Choice

What is the chemical symbol for the element Sulfur?

• Su

• S

• Na

• Ag

Multiple Choice

How can a mixture be separated?

• By

  physical

  means

• By

  chemical

  means

Multiple Choice

How does a mixture behave?

• Each component behaves just as it always did

• Differently from the separate components

Multiple Choice

How does a compound behave?

• Each component behaves just as it always did

• Differently from its component elements

Multiple Choice

How can the elements

in a compound

be separated?

• By physical means

• Not by physical means

Multiple Choice

Element, Compound or Mixture?

• Element
• Compound
• Mixture

Multiple Choice

Element, Compound or Mixture?

• Element
• Compound
• Mixture

Multiple Choice

Element, Compound or Mixture?

• Element
• Compound
• Mixture

Multiple Choice

Element, Compound or Mixture?

• Element
• Compound
• Mixture

Multiple Choice

Element, Compound or Mixture?

• Element
• Compound
• Mixture

Multiple Choice

Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?

• Picture A

• Picture B

• Picture C

• Picture D

Multiple Choice

Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a mixture?

• Picture A

• Picture B

• Picture C

• Picture D

Multiple Choice

Which of the following images best depicts the particles of an element?

• Picture 1

• Picture 2

• Picture 3

• Picture 4

Multiple Choice

Which of the following images best depicts the particles of a compound?

• Picture 1

• Picture 2

• Picture 3

• Picture 4

Multiple Choice

What kind of substance is composed of two or more elements that are chemically combined?

• element

• mixture

• compound

Multiple Choice

Which substance is a compound?

• copper

• magnesium

• saltwater

• water

Multiple Select

Which substances are elements?

• copper

• magnesium

• saltwater

• water

Multiple Choice

Which substance is a mixture?

• copper

• magnesium

• saltwater

• water

Multiple Choice

A combination of substances that are not chemically combined is called a

• mixture

• compound

• element

Multiple Choice

Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?

• compound

• mixture

• pure substance

• element

Multiple Choice

Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?

• an element

• compound

• mixture

• suspension

Fill in the Blank

A pure substance is one that contains ____ ___ type of substance

Multiple Choice

Which is the best example of a pure substance?

• pizza

• gold

• saltwater

• air

Multiple Choice

Is this the heating curve for a pure or impure substance? Hint: Does it melt at a single temperature or over a range of temperatures?

• Melts at a single temperature so pure

• Melts over a range of temp so pure

• Melts over a range of temp so impure

• Melts over a single temp so pure

Multiple Choice

Is this the heating curve for a pure or impure substance? Hint: Does it melt at a single temperature or over a range of temperatures?

• Melts at a single temperature so pure

• Melts over a range of temp so pure

• Melts over a range of temp so impure

• Melts over a single temp so pure

Multiple Choice

True or false: orange juice is pure

• True

• False

Multiple Choice

Na₂SO₄- name?

• sulfur sulfate

• sodium sulfide

• sodium sulfate

• sodium oxygenate

Multiple Choice

MgO- name?

• oxygen magnesium

• magnesium oxide

• magnesium oxate

• magnesium oxygenate

Multiple Choice

True or false: mountain air is more pure than valley air

• True

• False

Multiple Choice

True or false:

A heating curve

with an upward sloping gradient

during melting indicates

a pure substance is present.

• True

• False

Multiple Choice

Which term describes the substance that forms when two or more types of atoms join?

• element

• compound

• composite

• mixture

Multiple Choice

Is salt (NaCI) a compound or an element?

• Compound

• element

Multiple Choice

What is the definition of a compound?

• The smallest part of any substance which can exist on its own

• Two or more atoms chemically joined together (can be the same or can be different)

• A simple substance in which all the atoms are identical

• Two or more different elements chemically joined together

Multiple Choice

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

Multiple Select

H₂0 - name?

• hydrooxic acid

• hydrogen oxygen

• water

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