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Science Yr 9&10 > Chemical Changes > Flashcards

Chemical Changes Flashcards

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1
Q

Draw the chemistry tree

A

Refer to science book

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2
Q

What are elements? Give an example.

A

Pure substances containing ONE type of atom joined together, e.g. O2, H2

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3
Q

What can elements be seperated into?

A

Metals and non- metals

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4
Q

What is a chemical symbol? Give an example.

A

An abbreviation of an element’s name, e.g. Carbon (C), Oxygen (O) Sodium (Na).

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5
Q

What are compounds? Give an example.

A

Pure substances contaning two or more different elements joined together, e.g. CO2, H2O

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6
Q

Give examples of common compounds.

A

Water (H2O), Carbon dioxide (CO2), Hydrchloric acid (HCI), Sulfuric acid (H2SO4), Sodium hydroxide (NaOH), Sodium chloride (NaCl)

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7
Q

What is the breaking down of compounds into simpler substances called? Give an example.

A

Decomposition

E.g. Water –> Hydrogen and oxygen (by electrolysis, broken down into checmials by electricity)

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8
Q

Who devised the periodic table?

A

Mendeleev

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9
Q

What does an element’s position on the periodic table indicate?

A

It’s chemical properties.

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10
Q

What is the group number and what does it indicate in an element?

A

The vertical columns of elements and it indicates the number of electrons in the outer electron shell, e.g. Group 2 has 2 outer shell electrons

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11
Q

What is the period and what does it indicate in an element?

A

The horizontal rows of elements and it indicated the number of electron shells, e.g. Period 3 has 3 shells of electrons.

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12
Q

Draw and label an atom diagram.

A

Refer to diagram

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13
Q

What is a proton?

A

A positively charged particle.

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14
Q

What is a neutron?

A

Particles with no electric charge.

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15
Q

What is a electron?

A

A negatively charged particle.

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16
Q

What is valency?

A

The joining power of an atom.

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17
Q

What is the atomic number?

A

The number of protons in an atom.

18
Q

What is the mass number?

A

The number of protons and neutrons in an atom.

19
Q

What elements does Group 8 of the Periodic Table contain?

A

Noble gases (colourless, non-reactive gases), e.g. neon, argon.

20
Q

What elements does Group 7 of the Periodic Table contain?

A

Halogens (reactive, non- metallic elements), e.g. flourine, chlorine.

21
Q

Name some transition metals.

A

Copper, zinc (commonly used metal elements)

22
Q

Atroms always have equal numbers of… and….

A

electrons, protons

23
Q

How many electrons can the

  • 1st shell fit?
  • 2nd shell?
  • 3rd shell?
  • 4th shell?
A

1st shell fits 2 electrons
2nd shell fits 8 electrons
3rd shell fits 8 electrons
4th shell fits -2 electrons

24
Q

What is an ion?

A

A particle with an electrical charge.

When atoms gain or lose electrons, they are called IONS.

25
Q

Name the first 20 elements on the Periodic Table.

A

Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesiu,, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium

26
Q

Give the chemical symbol for the first 20 elements.

A

H, He, Li, Be, B, C, N, O, Fl, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca

27
Q

What is the chemical symbol for Iron?

A

Fe

28
Q

What is the chemical symbol for Mercury?

A

Hg

29
Q

What is the chemical symbol for Copper?

A

Cu

30
Q

What is the chemical symbol for Zinc?

A

Zn

31
Q

What is the chemical symbol for Silver?

A

Ag

32
Q

What is the chemical symbol for Tin?

A

Sn

33
Q

What is the chemical symbol for Iodine?

A

I

34
Q

What is the chemical symbol for Platinum?

A

Pt

35
Q

What is the chemical symbol for Gold?

A

Au

36
Q

What is the chemical symbol for Lead?

A

Pb

37
Q

Draw the ‘Activity of Metals’ valency chart.

A

Refer to science book :D

38
Q

What are radicals?

A

Groups of non- metals that behave as a single particle with a single valency.

39
Q

What is the formula and valency for:

  • Acetate
  • Bicarbonate
  • Cyanide
  • Hydroxide
  • Nitrate
  • Carbonate
  • Sulfate
  • Phosphate
  • Sulfite
  • Chloride
A
  • CH3COO, -1
  • HCO3, -1
  • CN, -1
  • OH, -1
  • NO3, -1
  • CO3, -2
  • SO4, -2
  • PO4, -3
  • SO3, -2
  • Cl, -1
40
Q

What is a cation?

A

Positive ion

41
Q

What is a anion?

A

Negative ion

Science Yr 9&10 (10 decks)

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