Atomic Structure Etc Flashcards

1
Q

What number is the top number on an element ?

A

The mass number Ar

Protons + neutrons

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2
Q

What is the bottom number on the element?

A

The atomic number

The protons only

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3
Q

How do you work out the neutrons in an element ?

A

Mass number - atomic number

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4
Q

How do you calculate relative atomic mass ?

A

Total mass of the atoms( percentage x mass number) divided by The number of atoms

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5
Q

Concentration ?

A

Number of moles of solute divided by Volume of solvent

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6
Q

Relative formula mass ?

Mg = 24 and Cl = 35.5

A

24 + (2 x 35.5) = 95

So the relative formula mass of MgCl is 95

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7
Q

Number of moles ?

A

Number of moles = mass dived by atomic mass

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8
Q

Protons are the same as____? (Number wise)

A

Electrons

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9
Q

Group 0/ noble gases are_____

A

Unreactive

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10
Q

Metals on the____ and non metals on the_____

A

Left and right

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11
Q

Group number = ________

A

Electrons in outer shell

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12
Q

Period number = _________

A

Number of shells of electrons

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