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What is the charge of a neutron?
0
Why are they placed in groups and period
Elements are placed in specific groups and periods based on their electrical configuration
Where do you find protons in an atom
Nucleus
What is the charge of a proton?
+1
What is the mass of a proton
1
Why do atoms have no overall charge
They have an equal amount of protons and electrons
How many shells fit into shell 1
2
How do you work out how many neutrons an atom has
Mass number - atomic number
What are isotopes?
Atoms with the same number of protons but a different number of neutrons
How do metals form ions
The lose electrons form positive ions
Atom
An atom consist of a nucleus containing protons and neutrons, surrounded by electrons in shells
Molecules
A group of two or more atoms chemically bonded together
How do non - metal atoms form ions
The gain electrons to form negative ions
a negative ion
A negative ion has more electrons than protons
What type of forces hold an ionic lattice together
Electrostatic forces
What properties does an ionic compound have
An ionic compound has a high melting point an it conducts electricity when liquid
What happens to the atomic radius as you move across a period in the periodic table
It decreases
Relative atomic mass
To find the average mass of an atom
Why do ionic compounds have high melting and boiling points
Because they have a strong electrostatic forces of attraction between oppositely charged ions require a large amount of energy to overcome.
Ionic bonding
The electrostatic attraction between oppositely charged ions
Atomic number
The number of protons in an atom. It determines the identity of the element and its position in the periodic table
Ion
A charged particle formed when an atom gains or loses electrons
Isotopes chemical and physical properties
Isotopes have identical chemical properties because they have the same electronic structure, but different physical properties ie to different masses
Increasing atomic number
Groups show elements with similar chemical properties, and periods show trends in properties
Noble gases are un reactive because…
They have a full outer shell of electrons, making them stable
Metal characteristics
Conductive and malleable
Non metal characteristics
Insulative and brittle
Fluorine is more reactive than iodine because…
Outer electrons are closer to the nucleus, leading to stronger attraction
Ionic bonding
Is the electrostatic attraction between oppositely charged ions, formed when electrons are transferred from a metal to a non metal
Why do ionic compounds have a high melting point
ionic compounds have a giant lattice structure, with strong electrostatic forces between ions
