The Periodic table
The columns on the periodic table are known as....
Groups
The inner part of an atom that contains the protons and the neutrons is called the __________.
Nucleus
Elements form Ions when they.....
Give away or receive electrons when bonding.
The most reactive group of metals are the.... (Group number and family name needed)
Group 1 alkali metals
Atomic size is.....
The size of an atom from the nucleus to the outer electrons
The element in row 3 group 2 is...
Magnesium
These particles have a positive charge and are found inside the nucleus.
proton
A positively charged Ion is called a
Cation
The most reactive NON metal group is the.... (family name and group number)
Group 17 (VII) Halogens
As you move across a row on the periodic table atomic size...
Decreases
The number of outer valence electrons it has
These particles are located within the nucleus, and have no charge.
Neutron
What charge would ANY group 2 elements have when they form their ION.
Why are noble gases unreactive?
They have a complete outer valence shell
What causes atomic size to decrease?
The addition of more protons in an element create stronger attraction to the oppositely charged electrons pulling them in closer
The row an element is in tell us what information?
The number of energy levels or shells it has.
These particles are negatively charge and are found outside the nucleus.
electrons
1-
Which element is more reactive Lithium or Potassium?
Potassium - Its 1 valence electron is on a shell further from the nucleus so it would have less ionisation energy to remove it's electron
Ionisation energy is....
the energy required to remove an electron
Name the 4 different families of group 1, 2 , 17 and 18 elements.
Alkali Metals, Alkaline Earth Metals, Halogens, Noble Gases
Atomic number tell us
The number of protons in an atom (which is the same as number of electrons)
10 (2.8)
Why are halogens the most reactive non metal? - refer to valence electrons and electron attraction.
Halogens are highly reactive as they have a almost complete outer shell. They only require 1 more electron and have strong electron attraction making them highly reactive.
Ionisation energy ________ as you move from group 1 towards group 17.
increases