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Year 9 Science > Term 1 > Flashcards

Term 1 Flashcards

1
Q

How many Protons does Neon have?

A

10

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2
Q

Neutrons = Atomic mass - protons
Find the number of neutrons of Na

A

Neutrons = atomic mass - protons
Neutrons = 23-11
Neutrons = 12

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3
Q

What am I ?

Oxygen + Hydrogen ~ Water
(Which are reactants and which are products?

A

Reactants
Hydrogen and oxygen

Products
Water

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4
Q

What am I? - Element with 8 electrons?

A

Oxygen

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5
Q

Fill in the blanks:

Chlorine is in group ____ and period ____

Copper is in group ____ and period ____

A

Chlorine is in group 17 and period 3

Copper is in group 11 and period 4

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6
Q

True or false? - If temperature increases the rate of reaction increases

A

True

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7
Q

True or False? - bases are 7 - 14 on the pH scale

A

False - 8 - 14

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8
Q

True or False? - The pH scale ranges from 0-15?

A

False, 1-14

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9
Q

On a periodic Table, are Groups Vertical or Horizontal?

A

vertical

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10
Q

What are the 7 signs of a chemical change?

A
  • Temperature Change
  • Bubbles appear
  • Colour Change
  • Change in smell or taste
  • Production of light
  • Precipitate forms
  • Change in Volume or Mass
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11
Q

True or False? - Bases produce 𝑂𝐻− ions in aqueous solution

A

True

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12
Q

On a periodic Table, are Periods Vertical or Horizontal?

A

Horizontal

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13
Q

What are 5 characteristics of Acids?

A
  • Corrosive
  • Taste sour
  • Common in Citrus Food
  • react with base
  • release H+ ions
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14
Q

True or False: is this equation balanced?

O2 + H2 ~ H2O

A

False, O2 + 2H2 ~ 2H2O

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15
Q

What are the 5 Factors that affect the rate of reaction?

A
  • Concentration
  • Temperature
  • Surface area
  • Catalysts
  • Agitation
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16
Q

True or False - The Law of Conservation of Mass means that the total mass reactants must also equal the total mass of the products

A

True

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17
Q

What are 5 characteristics of Bases?

A
  • Corrosive
  • Taste bitter
  • Common in cleaning products
  • react with acids
  • release Ho- ions
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18
Q

What am I? - Element number/ Atomic Number 4

A

Berylium

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19
Q

Fill in the blanks:
The law of conservation of mass states that: mass can neither be created nor _________

A

The law of conservation of mass states that: mass can neither be created nor DESTROYED

20
Q

True or False? - Acids will release hydrogen ions 𝐻+ in aqueous solution

A

True

21
Q

Is Burning wood Chemical or Physical change?

A

Chemical Change

22
Q

What am I? - The ____ Theory

A

The Collision theory

23
Q

Fill in the blanks:
Na is the element symbol for ___
Na has the element number ____
Na has ___ protons and ___ electrons.
Na has an atomic mass of ___

A

Na is the element symbol for Sodium
Na has the element number 11.
Na has 11 protons and 11 electrons.
Na has an atomic mass of 23 amu.

24
Q

True or False? - Bonds break between reactants and new bonds are created in products

A

True

25
Q

Where is the Atomic Number/ Element Number located?

A

Top right

26
Q

What am I? I released Heat

A

Exothermic

27
Q

Fill in the blanks:
Proton = _______ charge
Neutron = _____ charge
Electron = _____ charge

A

Proton = Positive charge
Neutron = No/Neutral charge
Electron = Negative charge

28
Q

Where is the Name located?

A

Under the big letter(s)

29
Q

True or False? -If surface area decreases, rate of reaction increases

A

False; if surface area increases rate increases

30
Q

Find the number of neutrons for Carbon

A

Neutrons = atomic mass - protons
Neutrons = 12 - 6
Neutrons = 6

31
Q

What am I? I am a chemical reaction the absorbs heat energy

A

Endothermic

32
Q

Fill in the blanks:
Aluminium foil is cut in half is a ___ change.

Jewellery rusting is a ____ change.

Milk going sour is a ____ change because there is a bad ___ produced.

A

Aluminium foil is cut in half is a physical change.

Jewellery rusting is a chemical change.

Milk going sour is a chemical change because there is a odour/smell/precipitate produced.

33
Q

Fill the blanks: When particles get ___ they move faster.

A

When particles get hotter they move faster.

34
Q

True or False? - Products ~ Reactants

A

False, Reactants ~ Products

35
Q

Where is the atomic mass located?

A

At the bottom

36
Q

True or False? - Acids are 1 - 6 on the pH scale?

A

True

37
Q

Where is the symbol located?

A

In the Middle

38
Q

Fill in the blanks:
30g Hydrogen + 15g oxygen ~ ___g of water
2g sulfur + ___g Iron ~ 8g of Iron Sulfide

A

30g Hydrogen + 15g Oxygen ~ 45g of water.
2g Sulfur + 6g Iron ~ 8g of Iron Sulfide

39
Q

True or False, Group 2 Period 4 is Magnesium?

A

False: Calcium

40
Q

True or False:

If the change in temperature is - 2 degrees Celsius, this is an endothermic reaction

A

True as there is a decrease in temperature

41
Q

What am I? - Element with atomic mass of 4

A

Helium

42
Q

Fill in the Blanks:

The minimum amount of energy required for an effective collision is called the ____ energy.

A

The minimum amount of energy required for an effective collision is called the ACTIVATION energy.

43
Q

True or False ~ This equation is NOT balanced
O2 + 2Zn ~ 2ZnO

A

False; it is balanced

44
Q

What is 7 on the pH scale and what is an example of it?

A

Neutral - water

45
Q

Is Cutting Paper a Chemical or Physical Change?

A

Physical

46
Q

Where is the Coefficients located?

A

At the begining (infront of the letter)

Year 9 Science (1 decks)

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