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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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A vertical column of elements in the Periodic Table is called a...
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Group
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Which group of elements are known as the Alkali Metals?
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Group I (1)
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Which group of elements are known as the Halogens?
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Group VII (7)
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Which group of elements are known as the Noble Gases?
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Group 0 or VIII (0 or 8)
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Elements in the group react in _______ ways.
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Similar
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Elements in the same group have simliar c_______ p_________.
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Chemical properties
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What is the name given to the particles that make up an atom?
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Subatomic particles
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Location of...
> electrons > protons > neutrons |
> Electrons = Outside nucleus
> Protons = Inside nucleus > Neutrons = Inside nucleus |
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Charge of...
> electrons > protons > neutrons |
> Electrons = -1
> Protons = +1 > Neutrons = 0 |
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Mass of...
> electrons > protons > neutrons |
> Electrons = 0 (approx)
> Protons = 1 > Neutrons = 1 |
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What does a.m.u stand for?
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Atomic Mass Unit
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The overall charge of the nucleus is...
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Positive (+)
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The overall charge of the atom is _______ because...
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Neutral because there are the same number of protons (+) as electrons (-)
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Label the following >>
[1] ---> 11 [2] ---> Sodium [3] ---> Na [4] ---> 2,8,1 |
1/ Atomic Number
2/ Element name 3/ Symbol 4/ Electron Arrangement |
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Define:
Atomic Number |
This is a unique number that is different for every element. It is the same as the number of protons or electrons.
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Define:
Mass Number |
It is the same as the number of protons + the number or neutrons.
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Label the following >>
[1] --> 19 [2]------> F [3] --> 9 |
1/ Mass number
2/ Symbol 3/ Atomic Number |
Example:
35 Cl 17 p = 17 e = 17 n = 18 |
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Electrons in an atom are arranged in layers known as...
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Energy Levels
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Example: (p.1 of data booklet)
Calcium - 20e - 2,8,8,2 NOTE: Elements in the same group have the same number of electrons in their outermost energy level. Elements in the same row have the same number of energy levels. |
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Define:
Isotopes |
Same atomic number, different mass number. Same number of protons or electrons, different number of neutrons.
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Example:
Chlorine contains TWO types of atoms with different masses. They have the same atomic number and look/behave the same. The only difference is their mass number / number of neutrons (this means the same thing): 35 37 Cl & Cl 17 17 |
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Define:
Relative Atomic Mass |
The average mass of the isotopes of an element. Relative atomic mass can be shortened to r.a.m.
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Example: (p.4 of data booklet)
Chlorine consists of two isotopes, 35 37 Cl Cl 17 17 present in the percentages 75% and 25% respectively. Calculate the r.a.m of chlorine. RAM = (75x35 ≑ 100) + (25x37 ≑ 100) = 26.25 + 9.25 = 35.5 a.m.u. |
