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Nat5 Chemistry > 1. Formula > Flashcards

1. Formula Flashcards

1
Q

What is a molecule

A

A group of non-metal atoms joined together by covalent bonds

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2
Q

What is a diatomic molecule

A

A molecule made up of 2 atoms

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3
Q

What method should you use to find formula when given valency

A

SVSDF

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4
Q

What is a group ion

A

Compounds with more than 2 elements

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5
Q

Do you need brackets for group ions

A

Yes

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6
Q

What is an ionic formula

A

A formula that shows the charges of the ions as well as the proportion of each

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7
Q

What should the total charge of an ionic formula be

A

0

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8
Q

What does an elements charge depend on

A

It’s group

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9
Q

What are the charges for transition metals written in

A

Roman numerals

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10
Q

What is a chemical equation

A

Where the names of the chemicals in a word equation are replaced with their formulae

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11
Q

What is the state symbol for solid

A

(S)

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12
Q

What is the state symbol for liquid

A

(/)

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13
Q

What is the state symbol for gas

A

(g)

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14
Q

What is the state symbol for a solution

A

(aq)

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15
Q

What is a balanced chemical equation

A

A chemical equation has the same number of atoms of each element on each side

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16
Q

What is the GFM

A

Gram Formula Mass. The mass of one mole

17
Q

How do you get the GFM

A

Adding together all the relative atomic masses of the atoms or ions in the formula

18
Q

What is the formula for number of moles

A

n = m/GFM

19
Q

what is the triangle for concentration

A

concentration = number of moles/volume

c=n/v

20
Q

what unit is volume in

A

litres

21
Q

what is the formula for volume

A

v= n/c

22
Q

what are the formulas for number of moles

A

n = cv

n = m/GFM

23
Q

what is the first step in the balanced equations method

A

identify the known and unknown

24
Q

what is the second step in the balanced equations method

A

find the mole ratio

25
Q

what is the third step in the balanced equations method

A

calculate and insert the gfm

26
Q

what is the fourth step in the balanced equations method

A

take the known substance to 1g and then scale the unknown substance to find the required amount

27
Q

what is the formula for gfm

A

gfm = m/n

28
Q

what is a standard solution

A

a solution of accurately known concentration

Nat5 Chemistry (7 decks)

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