chemistry

Flashcards covering the key concepts related to atomic structure, including definitions of particles and properties.

Nucleus

The central part of the atom that contains protons and neutrons.

Proton

A positively charged particle found in the nucleus of an atom.

Neutron

A neutral particle found in the nucleus of an atom.

Electron

A negatively charged particle that moves around the nucleus in electron shells.

Relative Mass of Proton

1

Charge of Proton

+1

Relative Mass of Neutron

1

Charge of Neutron

0

Relative Mass of Electron

Very small (often considered as zero).

Charge of Electron

-1

Volume of Electron Orbits

Determines the size of the atom.

Mass Concentration in Nucleus

Almost the entire mass of the atom is concentrated in the nucleus.

Standard Form

A way of expressing very large or very small numbers, such as 1 x 10^-14 m for the nucleus radius.

How to calculate relative atomic mass (Ar)

2 ways to separate soluble solids from solutions

Evaporation and crystallisation

What did Rutherford do

The alpha particle scattering experiment

Group 1 elements

Alkali

Features of alkali metals

• Very reactive

• Soft and low density

• Increase reactivity as you go down

How do u calculate mr

Add up the Ar(relative atomic mass) of each element in the formula

What is the formula triangle

M.E.P.B

methane = c1 ethane=c2 propane=c3 butane=c4

Alkane general formula

CnH2n+2

The shorter the hydrocarbon chain

The more runny , less viscous