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Flashcards in Atomic Theory Deck (11)
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1
Q

What are the 3 sub-atomic particles

A

Protons, neutrons, and electrons

2
Q

What is the mass, location and charge of protons neutrons and electrons

A

Protons - in the nucleus, positive charge (+1), 1 a.m.u.
Neutrons - in the nucleus, neutral charge (0), 1 a.m.u.
Electrons - outside the nucleus, negative charge (-1), 1/2000 a.m.u.

3
Q

How do atoms become neutral

A

Because there is an equal amount of positive and negative charges

4
Q

The atomic number is ….

A

The number of protons and electrons an atom has

5
Q

The mass number is …

A

The number of protons and neutrons added together

6
Q

How to write nuclide notation for an atom

A
Mass number top left 
Chemical symbol in the middle 
Atomic number bottom left
For example lithium:
7
     Li
3
7
Q

How to write nuclide notation for an ion

A
Mass number top left
Charge top right 
Symbol in the middle
Atomic number bottom left
For example oxygen with 8p, 10n, and 10e =
18     2-
     O
8
8
Q

Define an ion

A

Ions are forked when an atom looses or gains electrons to make it more stable

9
Q

Define an isotope

A

Isotopes are atoms with a different number of neutrons but the same number of protons

10
Q

How do you calculate the relative atomic mass (r.a.m.)

A

For example Chlorine 35 and Chlorine 37:
35 37
Cl Cl r.a.m. = (75 x 35) + (25 x 37) ( - over 100)
17 17 = 35.5

75% 25%

11
Q

What do atoms in the same group of the periodic table have in common

A

They have similar chemical properties as they have the same number of outer electrons