Elements In The Periodic Table
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What are the properties of non-metals?(3)
Dull Insulators of heat and electricity (except carbon graphite) Brittle
What do elements in the same group show ?
Similar chemical properties
How reactive are the alkali metals ?
Very reactive
How are alkali metals stored?
Under oil because the react violently with air and water
How reactive are the halogens ?
Very reactive
What do the halogens exist as ?
Diatomic molecules
How reactive are the noble gases?
Unreactive
What is inside the nucleus ?
Protons and neutrons
What are the properties of metals ?(3)
Shiny Malleable Good conductors of electricity and heat
Where are electrons ?
Orbiting in energy levels around the nucleus
What makes the overall charge of an atom neural ?
No. Protons = No. Electrons
What is the relative mass of a proton?
1 AMU
What is the relative mass of a neutron?
1 AMU
What is the relative mass of a electron?
0 AMU
What is the relative charge of a proton ?
1+
What is the relative charge of a neutron ?
0
What is the relative charge of an electron ?
1-
What is the number of protons in an atom known as ?
Atomic number
What do atoms become when they gain or lose electrons ?
Ions
What are ions ?
Charged particles
What do metals become when they lose electrons ?
Positively charged ions
What do non-metals become when they gain electrons ?
Negatively charged ions
In general what do ions have ?
Full outer shell
What are isotopes ?
Atoms with the same atomic number but different mass number