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Chemistry Module 2 > Atomic Structure and Formulae > Flashcards

Atomic Structure and Formulae Flashcards

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1
Q

What is atomic number?

A

The number of protons an element has in an atom

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2
Q

What is an ion?

A

A charged particle

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3
Q

What is an istope?

A

An atom with a constant number of protons and electrons but with a different number of neutrons

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4
Q

What is relative atomic mass?

A

the average mass of an atom of an element compared to 1/12 of a C-12 atom

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5
Q

What is relative isotopic mass?

A

the mass of one isotope of an atom compared to 1/12 of a C-12 atom

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6
Q

Equation for RAM using abundance

A 
                                                       100
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7
Q

Equation for percentage mass

A

RAM of substance A
divided by
Relative molecular mass of entire compound

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8
Q

How to write an ionic equation

A

1) only split aq substances
2) little numbers moved to front Cl^2 becomes 2Cl)
3) duplicate ions on either side removed (ions that undergo no change)
4) rewrite equation with what’s left

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9
Q

How to calculate empirical formulae

A

1) Mass/Mr for all elements
2) divide all by smallest result
3) simplify ratio

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10
Q

What is the value for Avogadro’s constant?

A

6.02x10^23

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11
Q

What does Avogadro’s constant represent?

A

The number of atoms per mole of carbon - 12

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12
Q

What is molar mass?

A

The mass per mol (g/mol) (Mr)

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13
Q

What is the equation for moles?

A

Mass/Mr

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14
Q

How do you find number of particles/atoms in a substance?

A

moles x Avogadro’s constant

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15
Q

Definition of empirical formula

A

smallest whole number ratio of atoms of an element in a compound

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16
Q

Definition of empirical mass

A

Total mass of all atoms in empirical formula

17
Q

Definition of molecular formula

A

actual numbers number of atoms of each element

18
Q

What ions do alkali metals make?

A

(symbol) 1+

19
Q

What ions do group 2 metals make?

A

(symbol) 2+

20
Q

What ion does Aluminium make?

A

(Al)3+

21
Q

What ion does silver make?

A

(Ag)+

22
Q

What ion does zinc make?

A

(Zn)2+

23
Q

What ion does ammonium make?

A

(NH4)+

24
Q

What ion does hydrogen make?

A

(H) -

25
Q

What ions do halogens make?

A

(symbol) -

26
Q

What ions do group 6 elements make?

A

(symbol) 2-

27
Q

What ion does nitrate make?

A

(NO3)-

28
Q

What ion does sulfate make?

A

(SO4) 2-

29
Q

What ion does carbonate make?

A

(CO3) 2-

30
Q

What ion does hydrogencarbonate make?

A

(HCO3)-

31
Q

What ion does hydroxide make?

A

(OH)-

32
Q

What ion does hydride make?

A

(H)-

33
Q

What ion does phosphate make?

A

(PO4) 3-

34
Q

What ion does chlorate make?

A

(ClO3)-

35
Q
A

Chemistry Module 2 (2 decks)

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