Elements And Compounds S1A Flashcards
(33 cards)
What are the three states of matter?
Solids, liquids and gases
Most elements are?
Solids
What are the two liquid elements
They are mercury (Hg) which is a metal and bromine (Br) which is a non-metal
What do particals do in solids
They are closely packed and they vibrate
In liquids particles are close and ?
Flow past each other
In gases particles are far apart and?
Flow
Gases change into liquids when?
They are condensed
Particles spread out from high to low concentration and this is called
Diffusion
There are spaces between?
Particles
When you heat a substance the spaces
Expand
When you cool a substance the spaces?
Contract
The elements are arranged in the
Periodic Table
The periodic table contains
118 elements
Some elements are man made and some aren’t
For any element?
There is only one type of atom
The periodic table can be used to
Find the names , symbols and atomic number of an element
The elements are arranged in the periodic table by
Increasing atomic number
A vertical column in the periodic table is called a
Group
A horizontal row in the periodic table is called a
Period
Elements in the same group have
The same number of outer electrons and have similar chemical properties
Elements in group 1 are know as
Alkali metals
Elements in group 7 are known as
The halogens.
Elements in group 0 are known as
The noble gases they are also non reactive
Atoms contain three particles
They are protons, neutrons and electrons
