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Chem Paper 1 > Key Concepts In Chemistry > Flashcards

Key Concepts In Chemistry Flashcards

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1
Q

What do Symbol equations need to be ?

A

Balanced , numbers must add up to the same thing of both sides

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2
Q

What do all of these stand for :
H2O
Co2
Cl2
NH3
H2
O2

A

H20 = water
Co2 = carbon dioxide
Cl2 = chlorine
Nh3 = ammonia
Hydrogen = h2
Oxygen = 02

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3
Q

What did Rutherford prove was wrong

A

Plum pudding method

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4
Q

What is the relative charge of a proton ?

A

+ 1

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5
Q

Relative charge of a neutron ?

A

0

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6
Q

What is the charge of an electron

A

-1

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7
Q

The nucleus :

A
  1. It is in the middle of the atom
  2. Contains protons and neutrons
  3. It has a positive charge because of protons
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8
Q

Electrons :

A
  1. Move around the nucleus im shells
  2. There negatively charged
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9
Q

What are protons and electrons in an atom ?

A

Equal

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10
Q

What are isotopes ?

A

The same number of protons just one extra neutrons

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11
Q

How is the periodic table laid out ?

A

In Collums and groups

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12
Q

What is the top number called of an atom

A

Mass number

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13
Q

What is the bottom number on an atom ?

A

Atomic number

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14
Q

What is the shell configuration

A
  1. Shell = 2. 2.shell = 8 3. Shell = 8
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15
Q

Define ionic bonding :

A

1.When and non metal and a metal react together

  1. The metal atom loses electrons and the non metals gains them
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16
Q

What does an ionic compound contain ?

A

And compound which contains ionic bonds ?

17
Q

Define covalent bonding ?

A

A strong bond which form when a pair of electrons is shared between two atoms

18
Q

Properties of giant covalent structures ?

A
  1. Atoms are bonded together in covalent bonds
  2. Very high melting points
  3. Don’t conduct electricity
19
Q

Metallic bonding :

A

The bond between positive metal ions and delocalised electrons

20
Q

What happens to atoms in a chemical reaction ?

A

No atoms are created or destroyed

21
Q

What happens when a reactant is used up ?

A

The reaction stops

Chem Paper 1 (4 decks)

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