Chapter 21- The Atom Flashcards Preview

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Flashcards in Chapter 21- The Atom Deck (10)
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1

Proton mass and location

1 unit
In the nucleus

2

Electron mass and location

Negligee
Orbiting the nucleus /shell

3

Neutron mass and location

1 unit
Nucleus

4

1 proton =_____ electrons

1,840

5

Top number on an element sign?

Atomic number
Number of protons (= to electrons)

6

Bottom left number on an element sign?

Mass number
Protons+Neutrons (-atomic number to get number of neutrons)

7

Number of electrons in each she'll

The atomic structure has 2 electrons in the first she'll and 8 in every other

8

Electronic configuration

Number of electron in each shell separated by commas

Eg. Aluminium's atomic number is 13
So, it's electronic configuration is 2,8,3,

9

Isotopes

Same atomic number (protons and electrons)
BUT
Different mass number (Ie. Neutrons have changed)

10

What is in an atom?

Sub-atomic particles
Protons +
Neutrons 0
Electrons -