Module 2: Foundations In Chemistry Flashcards Preview

OCR A Level Chemsitry > Module 2: Foundations In Chemistry > Flashcards

Flashcards in Module 2: Foundations In Chemistry Deck (18):
1

Name subatomic particles, their features and where they are found.

table

2

An element is written on the periodic table, as:
a
X
z
What do a and z stand for?

x minus y

3

What are ions, and why are they this way?

Charges p's, as diff no's of pr's / e-'s

4

Define isotopes, listing their properties.

props

5

Name a brief history of the atomic model.

whole page

6

Define Ar

Rel atomic mass: def

7

Define relative isotopic mass.

Def

8

Define relatice moleculae mass.

Whole box

9

How can Ar be found experimentally?

From isotopic abundances

10

What are the axies of a mass spectra graph, and how can they be used to fine the Ar of an atom?

1
2
3

11

Give an equation for the number of particles. Use this to define the 'mole.'

whole box

12

Define molar mass.

units, n=m/mr

13

How would you find the number of particles in 8.5g is H2S?

find

14

Give an equation linking volume, moles and gas volume.

Vol = moles x 24dm3

15

What is the ideal gas equation? (Indclude what each unknown represents and the units it is measured in).

name

16

Define both empirical and molecuar formula.

rehu

17

How can empirical formulae be calculated from experiments?

lh

18

How can molecular formulae be calculated from experiments?

laha